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Why Yoga tablet 2 screen looks so blurred and sharpened at the same time
Have you been wondering why your screen on the 10" Yoga tablet 2 with KitKat doesn't look really crisp even with some obvious sharpening applied? Here is why!
Lenovo screwed up twice!
1. Blur filter is applied. (KitKat ONLY) The BIOS/bootloader defines wrong display resolution. The Intel graphics driver (i915) gets confused and switches on panel fitting which includes a blur filter (fuzzy filter). Normally this is used if the display resolution is different from the frame buffer resolution to scale the image. Here the device just scales 1:1 and applies the filter. Luckily the driver is open source and it turns out there is a way to overwrite this feature No longer true for Lollipop. Thanks Lenovo
2. Sharpen filter is applied. (KitKat and Lollipop) The panel is not programmed correctly. When disabling the CABC feature (/sys/lcd_panel/cabc_onoff) the sharpening effect is gone. But CABC should have nothing to do with sharpen. Unfortunately the specs of the display (AUO B101UAN01.E) are not public so I cannot verify if the correct MIPI DSI commands are sent to the panel.
So our display is softened then sharpened again! What a waste!
Both workarounds are only temporary. After each screen off/screen on sequence the old values are restored by the system. So we need an app which sets the values after the screen is switched on. Or a new kernel. Or Lenovo cares to fix it in a future release
Fix (Root partially required)
I wrote an app which can disable CABC / sharpness filter (requires ROOT) and can disable the blur filter (KitKat, no root required) . Of course I am not held responsible if you brick or burn your tablet. I tested this on my 1050F with rooted firmware S000143_150105.
1. Copy app to device and install
2. Start app and select your setting
3. The settings may apply only after switching screen off and on again.
Source on Github:
http://github.com/Matshias/yoga2sharpness
Bugs / issues
- may not work directly after reboot, only after screen on/off
- fullscreen video may switch on CABC/sharpness filter again
Any suggestions? I'd be really happy if you could test and report
Cheers!
Matt
Update Jan 21
make more reliable and add complete source
Update Jan 26
Reliable implementation as app which automates this process.
Update Jan 30
new version 1.1 (please uninstall old version!):
- add option to start at boot and enable/disable applying the settings at screen on for manual operation
- add little delay after screen on for more reliable operation
- app should be harder to kill by the system
Update Feb 2
new version 1.1.1:
- Fix occasional reboot issue when using the setting on display on. Turns out Android sends screen on broadcasts sometimes even if the display is off. This causes a crash if the filter settings are applied.
Update Feb 11
new version 1.1.2 (please uninstall old version):
- hopefully ultimately fix reboot issues by using different method to start on boot
Update Apr 30
tested with new firmware S000198_150422. Same as before. Lenovo has not fixed the issue, but the app works like before
Update June 3
New version 1.1.3:
- fix full screen video playback re-enabling CABC/sharpness filter. As for CABC itself root is required.
Update June 17
Update for Lollipop version 1.2.0:
- blur filter disable no longer needed
- sharpness filter is still present. If root becomes available for Lollipop this should work there too
Update June 19
Fix for rooted Lollipop - version 1.2.1:
- the mechanism for sharpness filter disable from 1.2.0 didn't work, probably due to SE Linux restrictions
Matshias, you are a legend!
I bought a Yoga 2 10" a couple of weeks ago and the odd blurred and sharpened effect ruins what is otherwise a great little tablet. I'd always suspected it was some kind of odd scaling issue, but I haven't had time or sufficient Android knowledge (or root access on my device) to properly investigate it, beyond making up some test images with alternate 1 pixel wide black/white lines - which were rendering as grey on the Yoga 2.
I had a support ticket raised with Lenovo about the issue, so I've referred them to this post and one on the Lenovo Community forums.
Thanks for your hard work, hopefully Lenovo will implement the fix in a software update soon!
Cheers,
Richard
Thank you!
matshias: Thank you.
The blur filter disable makes a HUGE difference. I really appreciate you taking the time to post your results, hopefully Lenovo will take note and implement a permanent fix.
workes
Hi!
I have just started using your app with the latest firmware on a 1050L.
0) Unrooted device
1) installed your app and applied the non-root part of the fix - worked after screen on/off
2) rooted device with temporary cwm solution from this parent thread (- which worked as well)
3) applied the root-required part of the fix from your app - works as well
Thank you for this!
Great great great! Like the others here I was looking for a solution to this Problem since I bought the tablet.
I am really satisfied with your APP, now everything is way sharper.
BUT: When I test the screens resolution with a screen test APP, only the horizontal ( long sides) resolution seems to be right now. The vertical resolution (short sides) is still just grey, when testing single pixel lines.
Do you have the same Problem, what could cause this?
fanatictentacle said:
Great great great! Like the others here I was looking for a solution to this Problem since I bought the tablet.
I am really satisfied with your APP, now everything is way sharper.
BUT: When I test the screens resolution with a screen test APP, only the horizontal ( long sides) resolution seems to be right now. The vertical resolution (short sides) is still just grey, when testing single pixel lines.
Do you have the same Problem, what could cause this?
Click to expand...
Click to collapse
I see the same if the sharpness filter/CABC is still switched on. If you have root then try disabling the sharpness filter as well and then the screen test look fine. Obviously the sharpness filter in the panel is not uniform in all directions and seems to prefer horizontal resolution (in landscape mode).
Thanks again for the advice!
I just had to enable root, really cant look at that horrid screen anymore! But now it really looks as sharp as an 240ppi Display should look like!
problem
After installing the app I have problems.
In 10 minutes my tablet rebooted 3 times . Android not asked to reboot.
It was crash of sistem. My system is rooted.
After uninstalling I had no problems.
Regurds
Yosef said:
After installing the app I have problems.
In 10 minutes my tablet rebooted 3 times . Android not asked to reboot.
It was crash of sistem. My system is rooted.
After uninstalling I had no problems.
Regurds
Click to expand...
Click to collapse
Did you use the start on boot feature? This might cause it. I uploaded new version 1.1.2 which should fix that problem. Let me know if it works for you.
this is a fantastic fix, one that Lenovo should have implemented themselves
actually when i just got the tablet over christmas, it was running older firmware in which the blur filter was actually not enabled. yes i now realize the text was "over sharp" but it was clear, and what i expected for the price (i.e. not double the price for a galaxy tab S) but i was fine with the sharpness, it looked good, and the tablet otherwise suits my needs perfectly, and gotta love that built in stand. i didn't even know what people meant about the image quality, considering the mid-range target audience of the tablet.
anyway, i recently got the OTA firmware update to the current S000143_150105 and that's when it messed everything up. it enabled the blur filter, and it looked HORRIBLE. i tried to accept it because at 1 ft from the tablet, the text actually looked all right, perhaps even a slight improvement because it was slightly softer. but the blur filter is applied to EVERYTHING, so all the images and everything on the screen was blurred....it was like looking at an HD monitor with a state of the art GeForce video card but using the standard windows video drivers...everything stretched and totally blurry.
this is a great fix, i don't have my tablet rooted and don't want to take the potential battery hit to disable the sharpening filter (since i think it looks good just with the blur filter disabled). it might be in my head though, but i feel like the system is a little more sluggish...maybe due to the update, maybe because of this (great) app...i wish lenovo would fix this, seems easy enough. sours me to an otherwise great tablet for the price.
speaking of battery, i noticed in the last day after installing the fix that my tablet powered off sometime during the day, and when i restarted, the battery had drained about 30%. and it continued to drain faster than before. i previously got well over 10 hours of usage time playing movies and web browsing, in addition to up to several days of standby....today i had to charge it within 24 hours and only got about 7 hours use time and 13 hours standby...any chance it's related to the fix, or has anyone experienced it after the firmware update?
@digitalatlas: Thanks for testing the app.
Regarding your observations, I don't think sluggishness can be attributed to the app. After all it doesn't do much. Only when the screen is switched on or you manually start the app it changes the kernel setting. So it really shouldn't have any impact on performance.
The battery life should also not be affected by the app itself. It does not have any background tasks other than the kernel setting mentioned above and it shouldn't wake up the device as well. Although I saw occasionally that my app gets informed that the screen was switched on even though the screen was not switched on. That caused some reboot issues. But that was fixed with version 1.1.1 and 1.1.2 and I didn't see a reboot since I use 1.1.2. Also there are reports of hangs/reboots by other users unrelated to my app. Anyways it might be the case that changing the kernel setting has some other effect on the hardware, kernel and battery life. According to Intel documentation the filter is not meant to be switched on or off while the display is active. However, it is the only time it is possible to change it in our system. So to be sure we have to test and disable/uninstall the app and see if the battery life improves.
Hopefully Lenovo fixes this with an upcoming update!
Thanks!
Just got this tablet in the mail today and was disappointed by its display. So grateful for your fix, its like night and day with the blur gone. Guess I have a good reason to root now to get rid of the sharpness too. Mind me asking what method you used to root for this firmware?
Falv said:
Just got this tablet in the mail today and was disappointed by its display. So grateful for your fix, its like night and day with the blur gone. Guess I have a good reason to root now to get rid of the sharpness too. Mind me asking what method you used to root for this firmware?
Click to expand...
Click to collapse
I used the temporary CWM method [GUIDE] CWM & Root Lenovo Yoga 2 (8/10/13)
It is easy enough and works fine, but keep in mind that there might be issues with OTAs.
I'll keep track of the battery over the next little while, hopefully it was just an aberration that first charge. I'm getting better results with this second charge since the update and your fix.
Could you or someone post a picture shoeing the effect of turning the sharpening filter off? Might help some of us decide it rooting is in fact worthwhile. Thanks!
digitalatlas said:
I'll keep track of the battery over the next little while, hopefully it was just an aberration that first charge. I'm getting better results with this second charge since the update and your fix.
Could you or someone post a picture shoeing the effect of turning the sharpening filter off? Might help some of us decide it rooting is in fact worthwhile. Thanks!
Click to expand...
Click to collapse
I tried taking pictures but it doesn't really show the effect. Instead I made two screenshots and recreated the filter with GIMP. It should be very close to what the panel does.
Does anybody have any info from Lenovo? I think that this is preposterous! How can someone do that and have it go through testing? Unless there were no tests at all.
Buying Lenovo was a mistake.
v1.2 tested on my new 1050F. Awesome. I was disapointed by the screen but now it's perfect. Thank you so much to have done this patch!
+1
AMAZING PICTURE QUALITY!!.
Without blur picture is good, but witchout blur and sharpness image quality is FU…NG AWSOME!!
THANKS!!!!!
saupiquet said:
v1.2 tested on my new 1050F. Awesome. I was disapointed by the screen but now it's perfect. Thank you so much to have done this patch!
Click to expand...
Click to collapse
+1
Great app, thank you
Are you all running this with rooted devices? Mine is not yet rooted but notice a big difference with this app. How much better is it if I was to root the device? Thank you so much for this fix. I recieved my tablet today and was very disappointed with the display.
Out of nowhere, my phone's screen has tarted to flicker. The brightness flickers and is very distracting. I've already tried to flash the latest OxygenOS available, but it hasn't worked.
Thing is, it flickers in both OOS and TWRP but it doesn't when booting up and in the bootloader.
Is it a hardware issue or there's a software fix?
kami_sama said:
Out of nowhere, my phone's screen has tarted to flicker. The brightness flickers and is very distracting. I've already tried to flash the latest OxygenOS available, but it hasn't worked.
Thing is, it flickers in both OOS and TWRP but it doesn't when booting up and in the bootloader.
Is it a hardware issue or there's a software fix?
Click to expand...
Click to collapse
I've the same issue...out of the blue it started flickerin and is very annoying...half of the screen (dx side) is slightly more yellow...Have you found any fix for this?
afarnedi said:
I've the same issue...out of the blue it started flickerin and is very annoying...half of the screen (dx side) is slightly more yellow...Have you found any fix for this?
Click to expand...
Click to collapse
Nope, in the end I had to RMA the phone.
I had to go through the hops from support, but they were certain it was a hardware fault, I had it fixed at no cost.
There can be two things, one's Adaptive Brightness which usually does that, check if you have it enabled, disable it.
Second thing can be CABC (Content Adaptive Backlight Control) which works as opt's lcd throttler. It throttles, i.e. puts the brightness to a bare minimum when the temperature of the screen exceeds a particular value.
Now disabling this isn't very productive and/or practical. But if you want it disabled you can flash cm13 (a custom rom). On cm13 I've realised it works only on temperatures more than 65-70*.
I suggest you to keep your opt cool as long as you can.
Mine started flickering just after I made a change in Settings, and it was Turning OFF Adaptive Brightness
Mine just started flickering after I didn't change anything at all. Never used adaptive brightness in my life.
As of update 15.2016.1805.311, we still have a majority of bugs not fixed. I want to ask if anyone knows when is a STABLE version of the OS is going to be released? Android P maybe? Or at least ASUS should fix the trivial issues that very apparently exist on this phone? I will list some of these issues:
1. Multi touch issue while playing games like PUBG or Dead Trigger (I know this issue is related to all phones running oreo but maybe asus can do something with their next build?)
2. Lock screen at times does not automatically go off after 10 seconds and waits for the whole duration (5 minutes in my case) as set in settings>display>advanced sleep. Lock screen should not use this setting as this setting is for homescreen, by default lockscreen should go off after 10 seconds of inactivity (Looks like some background apps are keeping it awake)(has reduced but still exists as of .311)
3. Snapdragon audio + equalizer vanished completely from play music and other third party music apps after .309 update (each update seems to do more harm than good)PLEASE BRING IT BACK !!!
4. Support for apps like google camera (ASUS, you have promised stock android experience and this goes against that). This will bring a huge improvement in front and back camera performance. Or else, ASUS can develop a better camera app
Its already stable i am getting 12h sot easily for 2 days usage since 309 update.
1 multitoch is oreo bug and will be fixed in June patch
2 lock screen working fine for me
3 you can install manually equaliser
4 camera will not be activated in future updates
The firmware is pretty stable to me. It's more like general android usage issue and this happens to most other android phones.
1) Multitouch is oreo bug but I do feel that phone companies should fix the problem themselves since they are customizing their own rom.
2) Lock screen no issue for me
3) Equaliser I don't use. Not a bug nor something that causes "stability" issue.
4) Camera is working (though not the best quality) and not having it support google camera is not a "stability" issue. They have the rights to not enable cameraapi.
Aftab_khatri said:
Its already stable i am getting 12h sot easily for 2 days usage since 309 update.
1 multitoch is oreo bug and will be fixed in June patch
2 lock screen working fine for me
3 you can install manually equaliser
4 camera will not be activated in future updates
Click to expand...
Click to collapse
Do you have any idea when is the June patch or the next update is going to be released?
If I may add, ZenMotion gesture doesn't work on me after the phone restart. Needs to turn off and on again in setting to fix it. Normally this should work once enabled even after phone restart.
Other bug is that the screen temperature changer keep revert back to default for unknown reason after several restart (even an unstable custom ROM is better on handling these)
I'm on 311 build too. Still waiting for latest security patch...
rbraun799 said:
If I may add, ZenMotion gesture doesn't work on me after the phone restart. Needs to turn off and on again in setting to fix it. Normally this should work once enabled even after phone restart.
Other bug is that the screen temperature changer keep revert back to default for unknown reason after several restart (even an unstable custom ROM is better on handling these)
I'm on 311 build too. Still waiting for latest security patch...
Click to expand...
Click to collapse
Yes same here with the zen gesture.
Recently it appears that some apps of mine have been randomly changing the text size on the screen. I use the normal size text, haven't adjusted it in settings on my phone or in the apps. My screen resolution is WQHD+. The issue goes away when I completely close the app then reopen it. Most of the time the text becomes much smaller but there are some occasions where the screen text increases in size.
So far this has happened in Facebook, Facebook Messenger, as well as the XDA app (not labs, I don't have that installed).
Anyone else seen similar issues? I think it's due to adaptive power saving but not entirely sure so I decided to ask. I believe it is that setting because when I have it enabled I cannot change my screen resolution, making me believe it may be changing automatically while I'm using the app. I also primarily only use the above mentioned apps, so I don't believe it's localized to those apps.
Disable "adaptive power saving". Samsung has not addressed the bug yet (along with others).
Ace42 said:
Disable "adaptive power saving". Samsung has not addressed the bug yet (along with others).
Click to expand...
Click to collapse
Obviously I already have, it's one of my troubleshooting steps. I am giving it 24 hours because I cannot recreate the issue on demand and cannot predict when it will occur.
Have you seen it mentioned elsewhere?
Outbreak444 said:
Obviously I already have, it's one of my troubleshooting steps. I am giving it 24 hours because I cannot recreate the issue on demand and cannot predict when it will occur.
Have you seen it mentioned elsewhere?
Click to expand...
Click to collapse
Yes... Samsung Community, and other tech communities. 99% sure this bug was dragged from pre release. E: sure it has been mentioned on XDA but I don't spend much time on the S10 sections.
Decided to dig into this issue further and adaptive power saving is NOT the culprit. A convenient scapegoat, but the feature is disabled on my S10+. Anyway, look carefully at these screenshots. Notice anything?
Ace42 said:
Decided to dig into this issue further and adaptive power saving is NOT the culprit. A convenient scapegoat, but the feature is disabled on my S10+. Anyway, look carefully at these screenshots. Notice anything?
Click to expand...
Click to collapse
Medium power saving mode is the culprit (turning it on, or turning it off).
Ace42 said:
Decided to dig into this issue further and adaptive power saving is NOT the culprit. A convenient scapegoat, but the feature is disabled on my S10+. Anyway, look carefully at these screenshots. Notice anything?
Click to expand...
Click to collapse
JoeFCaputo113 said:
Medium power saving mode is the culprit (turning it on, or turning it off).
Click to expand...
Click to collapse
I think it was the combination of both in my case. I try to run on optimised but when adaptive power save was enabled I would find that medium was enabled. Needless to say, the issue has not occurred since disabling adaptive power saving as well as selecting optimised. I appreciate the assistance guys.
There are two problems:
Adaptive power saving used to still change resolution in background, even if it stated it wouldn't do so, it is(was?) a bug and to fix it you had to:
Enable Optimal
Go in the Home screen, pull down the Quickpanel and press on Power mode
It will ask you what settings to change when switching to Medium power mode, select the resolution you want, you might want to disable background data restricting too since it doesn't help
Now enable Optimal again, go to settings and turn Adaptive battery on
This way no matter when adaptive switches to medium power saving, it will follow the settings you saved for that profile.
The next bug is completely random and I don't really have it anymore, I just remember text randomly becoming super small or huge when checking recent apps from certain apps, DPI bug and the only fix was to hit home multiple times.
Hi,
I've noticed a UI lag when switching between apps or transitioning from an open app to home screen. This didn't happen in the Android 10 beta rom. Anybody have the same issue? I clean flashed the stable android 10.
I can confirm this issue in the stable release. But I would like to add that this lag was already in the beta release and is in my testing not app specific. I would clear the cache and make a reboot.
Go into developer options and disable the three animation types. Everything runs MUCH faster with them off.
Floridaplur said:
Go into developer options and disable the three animation types. Everything runs MUCH faster with them off.
Click to expand...
Click to collapse
I have, and while it does suppress animations, it actually feels less polished. And anyway, it does not resolve the UI lag which is really visible when using th app switcher. It's dropping below like 10fps. As if some gfx acceleration was disabled or the phone was completely overwhelmed
Anyone found a fix? I experience the lag every once in a while, though it's prevalent enough to be annoying.
I am having this literally every time i use the alt-tab like feature. Oneplus managed to **** up the one thing (butter smooth) Google has been bragging about for several versions ???
A simple fix would be toh format device once, as I have clean flashed and I don't face any lags
Dissable ram boost in system settings
fress said:
Dissable ram boost in system settings
Click to expand...
Click to collapse
I'm having random lag too. I'l try to disable RAM boost and is if it helps.
fress said:
Dissable ram boost in system settings
Click to expand...
Click to collapse
doesn't change a thing. (and am wondering it would. This feature is supposed to make smoothness (even) better, not worse)
Turn off auto brightness .. maybe it can help
I have been reading up on the A10 stable release posts and I saw a lot of people mentioning the issue that you are talking about here.
Many of them suggested a full format. So basically setting up your device as a new device.
I cannot confirm if this works for everyone but a lot of people are saying that after a fresh install they are not facing any issues.
All of the points mentioned above are just what I read from xda and op forum posts. I personally have not made the switch yet and probably wont be doing so soon.
Hey guys. I encountered the same problem on my Nokia 9. Not quite sure why this error doesn't get noticed by more people.
I think I fixed it for me though.
In my case it seemed that the OLED always on screen (which shows notifications and the time) was the problem in my case. It would always show that there are notifications even if there weren't any and that started adding up. So while the rest of my phone ran buttery smooth, the notification bar and lockscreen began looking like a Diashow. 2-5 fps sometimes. What I think is happening is that all these notifications are buggy and the always on screen can't get rid of them.
So my fix was turning that off and then restarting my phone. Since that everything runs smooth again.
If there is another thread I should post this to please tell me but I only found this one.
Hope it helped.
maxsak said:
Hey guys. I encountered the same problem on my Nokia 9. Not quite sure why this error doesn't get noticed by more people.
I think I fixed it for me though.
In my case it seemed that the OLED always on screen (which shows notifications and the time) was the problem in my case. It would always show that there are notifications even if there weren't any and that started adding up. So while the rest of my phone ran buttery smooth, the notification bar and lockscreen began looking like a Diashow. 2-5 fps sometimes. What I think is happening is that all these notifications are buggy and the always on screen can't get rid of them.
So my fix was turning that off and then restarting my phone. Since that everything runs smooth again.
If there is another thread I should post this to please tell me but I only found this one.
Hope it helped.
Click to expand...
Click to collapse
I think the issue is just : it's a ****show of awful coding, optimisation and non-existent testing. If manufacturers' programmers put in half the effort debugging their software we as "powerusers" at xda/reddit/... put twisting our brains in and out trying find correlating explanations and workarounds as to why we get UI lags or other absurd bugs (like 5GHz wifi not working anymore) on the 10th ****ing iteration of Android, we wouldn't have all of this. It all boils down to the general idea that because it is consumer grade product, quality check is just a non-subject. Apparent quality is just enough at product launch, and further updates (if they do get round to releasing them) can brake everything without manufacturers being held accountable.
The update showed up on my phone on the 25th, but, I'm NOT updating. 9 is too damn stable for me, & I don't see any "features" in 10 that will benefit me.
After reading all this i am not going to update to 10. Yet happy with 9.17.
Tmob unbranded dual sim op6t.
Narrowed down some parameters
I have the OnePlus 6, and have similar issues, that include swapping apps being slow, but not just the swapping of apps, any app that has typing in it, seems to DIE when I start typing. Maybe this is a google keyboard issue or something? I notice the issue most in the Microsoft Teams mobile app. It also tends to only happen when at least 2 apps are open, if it's on it's own, it seems to do fine.
This might just be coincidence but I went into dev settings and turned on "strict mode" and now I can't get it to lag like it previously did.
I just looked at my running services (dev options > running services) and saw that my Bluetooth was using 2.2GB of ram, and youtube was 1.7GB of that. I toggled bluetooth off, then back on and it reset this. I have not modified the strict mode setting above... still have not had any lag, will update this thread if I do get more lag.
MightySashiman said:
I think the issue is just : it's a ****show of awful coding, optimisation and non-existent testing. If manufacturers' programmers put in half the effort debugging their software we as "powerusers" at xda/reddit/... put twisting our brains in and out trying find correlating explanations and workarounds as to why we get UI lags or other absurd bugs (like 5GHz wifi not working anymore) on the 10th ****ing iteration of Android, we wouldn't have all of this. It all boils down to the general idea that because it is consumer grade product, quality check is just a non-subject. Apparent quality is just enough at product launch, and further updates (if they do get round to releasing them) can brake everything without manufacturers being held accountable.
Click to expand...
Click to collapse
Lagging issue I've seen many reporting in xda on the stock rom OOS 10.3.0. But 5GHz is working as expected. I can confirm it because I'm using 5GHz WiFI now and then
adondriel said:
I have the OnePlus 6, and have similar issues, that include swapping apps being slow, but not just the swapping of apps, any app that has typing in it, seems to DIE when I start typing. Maybe this is a google keyboard issue or something? I notice the issue most in the Microsoft Teams mobile app. It also tends to only happen when at least 2 apps are open, if it's on it's own, it seems to do fine.
This might just be coincidence but I went into dev settings and turned on "strict mode" and now I can't get it to lag like it previously did.
I just looked at my running services (dev options > running services) and saw that my Bluetooth was using 2.2GB of ram, and youtube was 1.7GB of that. I toggled bluetooth off, then back on and it reset this. I have not modified the strict mode setting above... still have not had any lag, will update this thread if I do get more lag.
Click to expand...
Click to collapse
After a night/day of normal testing with this, where I would normally have issues, I have not had and of the lag I mentioned above. This seems to have fixed some things. So, I would suggest that you first check to see what running processes are using all the ram, and then turn on strict mode in dev settings, if that doesn't solve your issues. I also have Ram Boost option turned off.
I experience the FPS drop quite often after the update. It's especially noticable when scrolling pages, switching between apps, pulling down the upper panel. The slowness seems to disappear temporarily after closing all apps. But I can't say that some particular app causes the lag.
UPD: A simple test to recreate the problem. I push the square button to switch between apps. Start swiping finger left-right and watch the animation smoothness. After 5-10 seconds comes the wave of low FPS, which lasts for a couple of seconds. Then the process repeats. The slowness doesn't seem to depend on some exact apps that are open.
UPD2: Well, I've just found out that the problem isn't constant throughout the day. There must be some connection to applications running in the background or something like this.