Database Users

Jerky scrolling with finger down, smooth when released

Has anyone noticed this? Wherever there's something to scroll, web pages, menus etc., the motion is sort of stuttering as long as you keep your finger on the screen. When you release your finger and "throw" the page, it goes smooth. This makes me think that it's not a graphic performance issue, but it's more like if the resolution of the capacitive touch screen was lower than the actual display. I hope I'm wrong and it's software related...

Software related, doesn't always do this.
Edit-
On second thought I am not sure, sometimes it does this really badly and other times it is completely smooth. If we didn't have full resolution touch you would notice it on a multi touch test app.
Sent from my GT-I9000 using XDA App

I think I have found the cause.
Cpu scaling!
Lock setcpu to 1 ghz and it is much smoother.
What is happening is the cpu speed keeps throttling and jumping back to full speed causing problems
Sent from my GT-I9000 using XDA App

Actually...still unsure...ideas anyone?
Sent from my GT-I9000 using XDA App

"Problems" with CPU speed jumping up and down? Those are not problems but a design decision (jury is still out on whether the implementation is done right) to save energy.
Of course you can crank everything up to the max and never put peripherals or the CPU to sleep, but please don't start complaining when your battery runs flat before the day is done.

They set the ramp down cpu speed timer far too short. This can be modded in a kernel anyway.
Using a multi touch test we have at minimum 600x300 touch resolution, way more then enough to have lag free scrolling.
There's an acer android phone out with only about 32x 24 touch resolution. They manage
Sent from my GT-I9000 using XDA App

I don't think it's related. I'm experiencing this even with the cpu locked in performance mode. On the other hand, using a multitouch test app, I was able to move a pointer pixel by pixel at what seemed to be the screen's full resolution, so touch res is not the cause.
It's quite annoying cause even if you want to launch a fast scroll of, say, your contact list, you get that initial ugly small stutter... when browsing the internet this ruins the experience even more, since you are likely to keep your fingertip on the screen more.

Dunno about you guys but uninstalling Gesture Search by Google fixed it for me.

Never had that on my phone...

Bump... am I the only one bothered by this?

Am I?...

Rizlo said:
Am I?...
Click to expand...
Click to collapse
Could be, I had a HTC HD2 and it suffered from that problem alot. numerous videos have been posted on youtube because of it as well.
One possible way of minimizing the problem is to electrically discharge your screen, by putting an electric conductor, such as metal on it to remove and negative/postive ions still hanging around. Read that up somewhere and it somewhat helped my HD2.
Personally i have only experienced once on my Sgs and have not been able to replicate it since.
If you have big fingers that could also be a problem as the touch sensor can't decide on where to locate your finger...

Thank you for your answer! The electrical conductor you mentioned should go somewhere to discharge though... I can't walk around with a ground wire hanging from my phone all the time Plus, I really believe it's software. I know it always goes there but... iPhones have similar technology but they always scroll smooth. maybe it's interpolation we're missing here.
Btw I have particularly small hands!

Discharging it only has to be done only when the problem seems to be worsening. just try not to place your entire thumb on it but rather use the tips of yours fingers, that way it doesnt jerk.

I have to say this problem is pretty consistent, hence not worsening (or improving) whatsoever in any circumstances. It's just not fluid, ah my Touch HD used to be, but that was because of poor GPU (driver); we know that can't possibly be the case here, and as a matter of fact, regardless of load, stuff in the background etc, it's there all the time.
But as soon as you release the fingertip, the "inertial" part of the scrolling just goes as smooth as possible.
So I'd dismiss the electrostatic explanation, it seems like it was a non-interpolated low touch resolution... except that it's not...

Hi Folks, I have noticed the same problem running eclair 2.1 with Ryan's one click lag fix applied (the lag fix did speed it up quite a bit too!). It seems to do it after coming out of 'sleep' mode i.e when I wake it up from blank 'screen saver'. After a few scrolls or taps it starts to smoothen out a bit, but still not as I would like it to be.... Just my observations and sorry I can't offer up any Solutions... Any word if 2.2 update will make things better? Also, does anyone know when the update will hit Australia?

Welcome to android world, iphone users.
The world where not everything is super-smooth.
Actually it might be related to smoothing of touch input. Btw my scrolling is quite ok, but I come from Sybian world, world of lag.

xan said:
Welcome to android world, iphone users.
The world where not everything is super-smooth.
Actually it might be related to smoothing of touch input. Btw my scrolling is quite ok, but I come from Sybian world, world of lag.
Click to expand...
Click to collapse
'smoothing of touch input'? could you please expand on this?
BTW - I Never owned an iFone, and don't really go for it's comunistic ways... (although some people take comfort in it! )

Hm, touchscreen sends raw data to driver (noisy, with peaks) to driver. Driver cleans and interprets them.. (unless its done in TS firmware)
I think that more cleaning and smoothing at this stage would result in smother scrolling, but not-so-precise tracking (when drawing, etc).
I'm just speculating here, because I have no real knowledge about this.

OK... Although it seems like there is a delay in reloading to short term memory when coming out of hibernation? Would this sound like a place to start looking? if so, anyone have any ideas on how to manipulate this function?

[Q] Flashlight-App for dual-LED (ultra-bright mode!)

Hi there...
I am searching for hours now...
I want a Flashlight-App that uses the "ultra bright" mode..
all apps I found only were "medium bright"...
if you ever used a Flashlight-App on HD2 on Windows-Mobile, you should know, what I am talking about.
Only App I found was nexus-one-torch.
I think it "takes photos" to make the dual-LEDs go maximum brightness, but the disadvantage is: it flickeres alot..
Anyone knows a Flashlight-App that uses maximum brightness of the dual-LED-Flash on the HD2 with Android?
Thank you!!
Greetings from Germany!

I like Tesla led. it seems pretty good...

But Tesla LED is not as bright as Windows-Mobile or "Nexus One Torch".
It does not utilize the maximum led-brightness. :/

Why would you need the Max LED flashlight?
Are you gonna setup a party xD!
I think that.. its useless.. the "one" (referred to the settings/drivers) we got now is awesome.. i can clearly see everything in my room when the lights are off.

Because the device is capable of such a brightness..
aaaand...
BECAUSE ITS COOL!

and you risk damaging your led lights...

burpingboy said:
and you risk damaging your led lights...
Click to expand...
Click to collapse
I ve runner N1 torch with High brightness for 40 minutes without any problem!

I to want to find an app like this, I miss the torch from WinMo.

burpingboy said:
and you risk damaging your led lights...
Click to expand...
Click to collapse
Uhm.. NO? Windows Mobile runs the maximum brightness with the standart HTC-Flashlight-App.. so definately: no!
=> Still searching an app!

have anybody found app? i also searched it for ages ....

Kralle said:
Uhm.. NO? Windows Mobile runs the maximum brightness with the standart HTC-Flashlight-App.. so definately: no!
=> Still searching an app!
Click to expand...
Click to collapse
asphaltkiller said:
I ve runner N1 torch with High brightness for 40 minutes without any problem!
Click to expand...
Click to collapse
You risk destroying the LED's, they will burn out.
It doesn't matter what your own personal experiences are, they will break. Think of it like staring into a laser and not seeing instant visual disruption. It'll happen, just give it time and it'll mess things up.

dkl_uk said:
You risk destroying the LED's, they will burn out.
It doesn't matter what your own personal experiences are, they will break. Think of it like staring into a laser and not seeing instant visual disruption. It'll happen, just give it time and it'll mess things up.
Click to expand...
Click to collapse
Everything breaks eventually my friend. I admit it may shorten the leds life span but some might not care because they wont use their phone for years and years. I personally have been using high mode on my nexus one for over a year and its still going

If you need something brighter than tesla, wouldn't it make sense to just use a maglite? Phones are great for minor conveniences, but just like the cameras, if i wanted top quality photos, i'd buy a digital camera not try to squeeze quality out of an inferior cel phone cam. Same with the flashlight, great if u drop ur keys at night, not so much if you're trying to light up your whole backyard or something.
-HD2 Android-

i dont think the torch app really uses the brightest setting.
i think its a matter of being properly programmed/optimized for hd2.

You could try Mag Flashlight, it has two brightness levels, but I'm not sure if it can use dual LED

yeah i remember the stock Hd2 flashight was WAY brighter, it puts the ones on android to shame, i want it back!

Yes, I've downloaded all available flashlight apps on the android market for my htc hd2, and NONE of them have matched to the htc hd2's windows mobile version. That particular version had 3 settings, low medium and high. All of the android flashlight apps seem to match the MEDIUM setting that the windowsmobile version was able to output.
Can someone port or write an android app that's nearly identical to the stock htc hd2's flashlight app that had 3 settings, without the annoying 5 second demo animation at the beginning on how to use it? That third setting (high) was KILLER, and impressed all of my friends as to the htc hd2's dual led true potential!

Same here, anyone have found any program with full bright?

HERE IT IS! (well i think its it. IDK)
okay so i pulled this off my typhoon CM7. its the "Torch" app. it has a high brightness setting as well as a strobe feature. (i have my mini raves XD)
its in apk format.
put it in sdcard, use a file explorer to locate it and install it. it should work.
btw i forgot. if it works hit the thanks button have a good day.

Unfortunately, like everyone is saying even the one that you pulled from the typhoon (althought it says it is the highest possible setting) is not the brightest setting that WM was able to achieve. Anyone else still looking for this like me? If someone who knows what they are doing could do this, it would be awesome!
For those that don't understand why we want this, you haven't used the WM LED flashlight long enought. I actually have great stories that goes along with the brightness of HD2 flashlight in WM (from everyone envying me at concerts to saving a bunch of us in the middle of the woods after the sun went down in the middle of a hike that went wrong =P).

Weak top LED

I have this sudden problem where my top flashlight LED is shining very weak, does anyone else have the problem? What could I do to fix it? I am currently running MrGarak's MIUI 1.4.29.
Kind regards,
Cbxu
Swyped from my HTC Desire HD using XDA App

Mine has always shined weakly, and so has every other DHD I've seen. Almost useless in daylight. This is particularly true for the flashing green LED, the orange charge light is a bit brighter. Also when viewing the phone at a slight angle, the LED is hidden by the earpiece bezel.

I'm using Revolution HD 5.1.4 and here the led isn't that bright...
We just need to accept this i quess

maybe i wasn't clear enough, but I meant from the flashlight on the back from the camera ...

dreamwearl said:
I'm using Revolution HD 5.1.4 and here the led isn't that bright...
We just need to accept this i quess
Click to expand...
Click to collapse
I don't think it's ROM related. I'm on ARHD 5.1.4 too and both LEDs are bright.

Different ROM
Try flashing a different ROM. If that doesn't work, it might be hardware related.

It's not a rom problem it's just the default light brightness.

so one led always was brighter than the other one? i thought they used to shine at equal brightness

Cbxu said:
so one led always was brighter than the other one? i thought they used to shine at equal brightness
Click to expand...
Click to collapse
Just half-blinded myself checking for you; mine both shine at equal brightness (ARHD 5.1.4 with 5.1.5 speed/battery patch). Tried using flashlight app and Google Goggles with light on.
Maybe try a different ROM to check (if it's causing you problems having one brighter), otherwise may be a hardware issue.
//sent from my Desire HD using Tapatalk; all errors entirely intentional.

can you try to use torch app and see if this problem also appears there??

I used the torch and it did appear there too, i switched roms and there too. I guess it is a hardware failure.

sorry dude, now restore your backups and send it to htc.
dont believe its an user fault.

[Q] "banding" screen issue

Hi everyone, i bought this phone ~1 week ago.
Everything works fine and i'm pretty happy with it(even if i'd like some more smoothness coming from such high specs).
The main issue i met is the "banding" problem, i read a bit on the internet and it looks like it's a software problem(it has something to do with colors depth).
What i'd like to know is if it's normal having "banding" problems of this entity and so frequently(it happens in almost any gradient displayed on the screen even on apps).
The other strange thing is that on my browser(stock one) sometimes the image changes for 0.5 secs every 2-3 secs and the banding issue doesn't show but it has some other "definition" issue as you will notice from the screenshots below.
Screenshot 1: banding issue(it happens all the time, even with apps' gradients; is it normal?).
Screenshot 2: banding issue almost gone but the image is not as defined as it should(it happens sometimes for 0.5 secs every 3 secs or so).
Does this come from a software problem or an hardware one? Do you have the same issue?
I'm using rocket rom v10.
Thanks

Ops... it looks like my thread belongs to the Q&A section.
May a moderator please move it?

I think this might be a software issue which I have experienced with MIUI on my old HD2. I'm using 2.3.6 stock rom right now and doesn't seem to have this problem

The banding issue is there since the Galaxy S1 days, Did any of the custom ROMs really fiix this issue?

Desire HD also had this problem in its early days. Mine got fixed when i flashed MIUI (2.3.7)
Sent from my GT-N7000 using xda premium

intermittent lines on screen. hard or software?

hey,
I've noticed some lines showing up on my screen... they only show once every 10/15 min and run across the vritical when in landscape mode. typically only one or two pixels thick and lasts only a moment.
Like every one my tablet takes a tumble now and again, but if it was hardware then my is it so intermittent?
any ideas?

I think this has happened to mine too but it flashes so fast that I don't know if it's happening or I'm seeing things. It's very rare though for me.
Sent from my Nexus 7 using xda premium

I get it every now and again, seems to happen when the screen has been on for a long period.
Not sure what is causing it, I tried to Google it but couldn't find anything.

It seems to be software guys, as before the 4.1.2 update I was getting these lines around 2x as often. Hopefully the next ota knocks them out for good.

I think it is WiFi reception strength related. In my case, they appear only when WiFi signal is weak. They have been there since the beginning. But now, not only vertical, some times horizontal lines appear as well. Horizontal lines didn't exist before 4.1.2 update. Same issue have I with my TF700. So, I assume it's both hardware/software related.
Sent from my Nexus 7

I never had this with stock rom but have had it with some custom roms, I had it with "slimbean 2.7" but since updating to 2.8 it has gone. So, it points to software.
Maybe megamoz is onto something too.
I don't think it is a faulty screen. Something else is going on.

I am on rooted stock, had them both before and after rooting.
Don't think it is related to the WIFI, not for me anyway, as I get it when browsing in the living room and I sit right next to my router so I get full signal.

Dudditz said:
I get it every now and again, seems to happen when the screen has been on for a long period.
Not sure what is causing it, I tried to Google it but couldn't find anything.
Click to expand...
Click to collapse
that would sound like a prime candidate for me. I have been stuck in hospital for 10 days, and the tab has been on for 15+ hours at a time some days... although the wifi angle is interesting too.
just happy its "normal" and not that I dropped it
thanks everyone for you input

Yeah I am also getting them and they seem to happen more when there is alot of white background on my screen or maybe that's when I notice them more lol but as far as problems go that's all my NEXUS7 has so hopefully it is software and can be fixed with a good old update COME ONNN 4.2 GOD BLESS YOU GUYS
Sent from my Nexus 7 using xda app-developers app

I see it everytime I use Flipboard, and also have noticed it in Maxthon occasionally. At times it flickers, and others the thin line will stay until I move to another page/screen.
Sensation, ARHD667

its software. i remember seeing a post a while back about a guy who managed to take a screenshot of it. somehow. if it was a hardware issue, it wouldnt appear on a screenshot