Related
Hi there!
Is anybody working on porting linux to xda now ? Is any info about project's state available ?
I found this idea very interesting, and I'm interested in porting Linux on my cell phone - SONY CMD-J5. Internally xda & j5 is very similar(!) - both have hercrom100 cpu, twl3011 chip, and there is absolutely no docs on hardware, excluding firmware hackers' info (r00t.host.sk, http://hyperion.sp.unipg.it/bodhi3/), but there is still nothing that seems like datasheet.
HI
No help to give I'm afraid but am having a similar linux problem. Mainly connecting to a linux based wireless LAN and using telnet facilities on linux systems.
No progress
Hi,
As far as I'm aware no-one is working on it. Mostly because everyone is too busy with other stuff and it doesn't have priority. Maybe because people are too busy finding out what can be done with the current software.
One note though: when running Linux on an XDA you have nothing todo (or hardly) with the hercom chipset etc. The ARM that would run Linux is completely separate and would communicate with the GSM modem through a serial AT command interface.
OK, thank you.
And then a new question: if two devices both using hercrom100 & twl3011 chips, they must (?) have similar hardware IO ports. For example, it was concluded that on Sony J5 on-chip com port data register is accessible via 0xFFFF5800 port, and first timer's control registers are accsible via 0xFFFFF800, 0xFFFFF802, 0xFFFFF804 ports. I didn't find any info about this ports on the site's pages. What's the matter ? I know that they are busy people, and cannot spend a lot of time disposing XDAs. More politely, I want to ask - is any sort of similar info is available to anybody ?
In the XDA all or almost all I/O with the end-user is taken care of by the StrongARM chip. This chip communicates through GPIO lines and a serial port with the GSM ARM chip. This part is the custom ARM/DSP combo. I suspect that there will be great similarities between things like hardware ports on the processors themselves. I doubt that the are used in the same way as on the XDA. For the XDA port it is not needed to touch the hercom chipset at all.
Porting linux to something like such a Sony sounds like a very big and uncertain effort. With the XDA at least there is the iPaq, which is similar and has a linux port. Still for that port Compaq used a lot of internal specs that are not available on the XDA. I suspect the Sony to be quite different from the XDA because I don't think it will have and additional strongARM for starters. Do you know if the thing was manufacutered by HTC for Sony? Because if it is a Sony design than even if the chipsets are identical there is no comparison possible.
Hmm. I expected that you have a bit info about hercrom chipset.
Also I expected that hercrom chip plays a more significant role in the xda, than a gsm modem. But the firmware loaded to hercrom cpu might be useful - possibly it converts AT commands to the output on some ports to drive the gsm hardware; may be it quite plain for reverse-engeneering than Sony firmware, where gsm hardware driving routines mixed up with lot of other stuff. Hmm. May be, it is possibe to find a guy from, for example, HTC software development team, who can help us. Dreams, dreams..
"Porting Linux" is sounds quite good, but now it's no more than brave idea, you right.
There is no additional chip in the Sony that drives LCD, takes care of user input and so on. Also, I don't know who is real manufacturer of the device. It is almost certainly known that hercrom is the one and main cpu in the device. There are 32Mbit flash chip, in which resides the firmware. And this firmware is disassembled by ~10-20 volunteers.
Thank you very much.
And where is my Interactive Disassembler ?
Hello all...
Just some quick questions with xda and linux...
- What's the current status of linux support? Like, what works, what doesn't?
- How many people (or maybe also who) are actually working on porting linux onto the xda?
- What has to be done for xda linux support?
Thanks.
Pigeon.
Staus of porting Linux to XDA
Status of porting Familiar Linux to the XDA:
a) Lots of people think it would be totally cool
b) Nobody's doing it
We here at XDA-developers would love to help out and share our experience with the device and we can invest quite a bit of time. But we're not diving into this one on our own (just yet).
Given that Familiar Linux runs on an iPaq the job wouldn't be too great. Getting the kernel to run would be doable. Getting it to talk to the screen, modem and buttons may be a little more tricky. And there issues with the flash chips not being supported by Bootblaster (?). Probably the lack of a sleeve-interface and/or CF-card slot would make development a little bit more tricky.
All in all, it would be a Good Thing (tm) if some people that are really familiar with familiar would spend a secluded weekend with some of our gurus, sometime later this summer. Maybe do this as a project at CCC Camp?
Familiar and etc...
I've been using Linux/Familiar on my Ipaq for quite a while (2+ years). I'm also a developer for Familiar and GPE (not actively right now though, "busy" you know I have a fair bit of knowledge how it works as a distro. However I'm not really a Linux kernel/drivers hacker. I'm willing to help porting Linux onto xda for sure, though I don't really own a xda yet, which is even more tricky. Been looking around ebay for xda but haven't started really getting/biding one yet.
Anyway... I'm basically one of those i-am-not-buying-a-device-unless-it-can-run-linux person.
Cheers.
Lots of recruits
Looking like there are a lot of us on this site just gagging for Linux on our XDA. Hopefully by the end of the summer this will have emerged in some way then.
Perhaps now would be an appropriate time for somebody here, or elsewhere to take charge? Of course it has to be somebody who has time, and knowledge. Me personally am one of the many people who are eager to test, but don'y have a clue!
Many thanks. And heres to something getting underway very soon.
w w w . l i n u x . x d a - d e v e l o p e r s . c o m
here we come !!!
Martin
Maybe we could have a bit more detail list of what steps are needed to be done/discovered in order to have a usable (or full) linux port on the xda?
Something like...
- JTAG
---- locating JTAG pins(?)
- bootloader
- drivers(?)
- etc(?)
Someone who really knows about the xda can come up a comprehensive one and people can slowly work on them?
Pigeon.
Hi
Now that I made some progress, we can look at this.
pigeon said:
Maybe we could have a bit more detail list of what steps are needed to be done/discovered in order to have a usable (or full) linux port on the xda?
Something like...
- JTAG
---- locating JTAG pins(?)
- bootloader
- drivers(?)
- etc(?)
Click to expand...
Click to collapse
Currently I finished the JTAG part and a bootloader can be flashed in this way. More details can be found at the following page, but it has not been finished completely yet: http://xda-developers.com/jtag/
To port Linux, I think the following steps are needed:
- reverse engineer the hardware mapping to registers, pins and addresses
- port a bootloader with this information
- port the kernel with this information
Now the first two parts would be an iterative loop, starting with a basic set of hardware features such as screen, touch screen and buttons. For this it is necessary to understand how the bootloader (for example bootldr at http://cvs.handhelds.org/cgi-bin/viewcvs.cgi/bootldr/) works and how it can be limited to basic functionality.
When the bootloader has been ported with the basic hardware features than this information can be pretty much directly used for porting the kernel.
Question is:
Who has experience with coding in the bootldr or BootBlaster for iPaq?
Who has experience reversing the Wallaby bootloader to figure out how hardware is controlled from software?
Who can create a basic build for running the bootloader in RAM on the XDA from Windows CE?
Any volunteers can mail me, but I don't have much time to instruct. People should have the ability to take a 'Figure out how the LCD is controlled' and proceed from there with something like IDA Pro.
XDA developer W4XY said:
Question is:
Who has experience with coding in the bootldr or BootBlaster for iPaq?
Who has experience reversing the Wallaby bootloader to figure out how hardware is controlled from software?
Who can create a basic build for running the bootloader in RAM on the XDA from Windows CE?
Any volunteers can mail me, but I don't have much time to instruct. People should have the ability to take a 'Figure out how the LCD is controlled' and proceed from there with something like IDA Pro.
Click to expand...
Click to collapse
Ok, I took it upon myself to at least create a basic port and procedure for getting bootldr running on the XDA in RAM (without flashing). When that is working, I'll post more details on where to get it etc.
Good Luck
We appreciatte the effort that you all make on this site. As I have no experience in any of the things that you mentioned I can be of little assistance for the moment. But as one of the few here that are interested in this Linux port, I look forward to testing and giving feedback.
Looking forward to the XDA Special Edition Linuc ROM ! ! ! v0.01
Martin
Available to work
I have a couple of years experience coding under Linux on desktop PCs, and some experience coding kernel modules, although no specific experience of Familiar.
I don't have an XDA yet (quite a big obstacle except at CCC), but I want to get one soon; I saw one a friend of mine had, and I fell in love with it.
I have quite a lot of time to work on stuff like this, and I'm thinking of going to CCC if a couple of other people are who are interested in Linux on XDA.
I'll be on #xda-developers on IRCnet and #familiar and #handhelds.org on Freenode.net pretty much every evening (BST) and my email is [email protected]
Good deal. Thanks for the offer for assistance.
Can't come to CCC
I'm afraid I've decided that I can't come to the CCC. It's too short notice (only found out about it a couple of days ago), a long way to travel, I'd be coming alone, and I already have plans for that weekend.
Contributors sought
An old thread back to life! Linux porting has now started in full on http://xanadux.org. We're looking both at porting to Wallaby and Himalaya and do not want to stop after the kernel is done. Userland applications and maybe even a full distribution are our goal.
Check it out.
I wish to know:
1. What is the status of the project now?
2. How to join? (I tryed to send to the email there but couldn't)
regards,
Hi,
AlBaraSoft said:
I wish to know:
1. What is the status of the project now?
Click to expand...
Click to collapse
Currently there are two developments going on:
XDA 1 or Wallaby: http://wiki.xda-developers.com/wiki/WallabyProgress
XDA 2 or Himalaya: http://wiki.xda-developers.com/wiki/HimalayaProgress
Progress and information can be found in the respective Xanadux pages: http://wiki.xda-developers.com/wiki/XanaduxDeveloperHome
2. How to join? (I tryed to send to the email there but couldn't)
Click to expand...
Click to collapse
Oh that is strange. Where did you send mail to and what was the result? The e-mail address is: [email protected]
Beware that the current state of linux is very primitive. But with both it is possible to boot Linux and start TCP/IP networking over USB.
If you want to join and try and implement a feature help is very welcome! We are looking at several features such as Touch screen, button support, GSM modem etc.
Hi,
At work, we have about 15 Hermes (or SPV M3100) devices.
they are great and especially when we think about flashing them and working with application on it.
I was thinking to buy a TyTN II for my personal use, however as i do not know it so well (except was is on HTC web page)
I would like to know if someone here, has/had both models and if he can compare them.
thx.
A.
Make an Informed Decision!!!!
Make sure you're aware of the issues before deciding to buy the TyTN II:
Kaiser Video Driver Bounty - ~$5199.51 Raised As Of Jan26
Proper video drivers and unlocker Project
Petition opened for HTC - 4210 signatures - spread the word
HTCClassAction.org - Driver issue awareness and possible lawsuit investigation
Hello everybody,
during my trip to China (still here at the moment ... ) I have bought the tablet PC in subject, for 150 USD.
It comes with WiFi, 16 gb, HDMI USB and ICS 4.0.3
Now, it tested it for some time before buying, for what I paid, it is OK, but I am now eager to know more about it.
The vendor's website does not tell much, even after Google Translate
suolx DOT com
Do you have any idea about how to
Understand what hardware I have
Know which other ROM I can load on it
Improve the WiFi reception (really weak)
Thanks a lot!
me too
I have bought one as well from dx.com and have no info about it
mine is S66 though sounds the same almost
agreed the wifi is the worse reception on android ive
come across.. even when you like 3 meters away
Im seeing if anyone has superuser it as it really needs
it
if anyone has succesfully rooted let me know
Hi! I did superuser it, no big problems, I found very useful the instuctions on slate droid forum.
Now i bought another more powerful device.
Sent from my Transformer TF101 using Tapatalk 2
Me too.
Sent from my SGH-T989 using xda premium
Hi All,
Hopefully this is the right part of the forum to post my request in.
I'm currently working on a university project that involves the development of a tablet application to assist in underwater acoustics research. I've been told that the department have some budget to buy a tablet for development and testing, but before they will release the funds I need to provide detailed technical specification about the potential devices including information about the models of accelerometers, orientation sensors, barometer (if the device has it) and GPS chip.
I'm aware that there is an application called Android System Info and have used it with my Wildfire S; it gave me the model numbers of the sensors used in the device, and from that I could look up the data sheets. I can't post the link as I'm a new user but it can be found by searching for "Android System Info" in the Play store.
The problem I have is that, whilst this information I need is clearly accessible through the application, I have no access to Android tablets other than the Nexus 7. Unfortunately my application requires a rear camera!
I was wondering whether anyone out there could please post the output of the "Sensors" category on the AIS application for the following devices:
Acer Iconia Tab A100
Asus Transformer Pad TF300-T
Motorola Xoom 1
Motorola Xoom 2
Samsung Galaxy Tab 2.7.0
Samsung Galaxy Tab 2 10.1
Sony Tablet S
Toshiba AT300-101
I have tried looking in the PDAdb and various other websites but haven't been able to find the model numbers of all the sensors used in each device, so if anyone could help me out I would be extremely grateful!
Thank You,
Ern
try searching for the device and "tear down"
bhundven said:
try searching for the device and "tear down"
Click to expand...
Click to collapse
Hi,
Thanks for that tip. I managed to find the data I need for most of the devices but am still looking into the others.
Ern
You could also get the sensor HAL for those devices, then try getting the model numbers through "strings".
It's usually found at /system/lib/hw/sensors.<platform>.so
Does anyone with a Tab 4 have HDMI out working and if so which cable/adapter are you using?
I have ordered a cheap ebay cable for a Tab 3 8.0/10.1 that is supposed to have the Samsung 11 pin MLH usb plug. Does the Tab 4 use the same 11 pin jack as the Tab 3? I also saw a post here about screen mirroring for the 7.0 but nobody answered....the specs for both the Tab 3 7 and Tab 4 7 on the Samsung site show NO screen mirroring, only 8.0 and 10.1. That fact alone leads me to believe the Tab 3 cable will work.
macbroom said:
Does anyone with a Tab 4 have HDMI out working and if so which cable/adapter are you using?
I have ordered a cheap ebay cable for a Tab 3 8.0/10.1 that is supposed to have the Samsung 11 pin MLH usb plug. Does the Tab 4 use the same 11 pin jack as the Tab 3? I also saw a post here about screen mirroring for the 7.0 but nobody answered....the specs for both the Tab 3 7 and Tab 4 7 on the Samsung site show NO screen mirroring, only 8.0 and 10.1. That fact alone leads me to believe the Tab 3 cable will work.
Click to expand...
Click to collapse
I tried it with a monoprice adapter and it did not work, I did not spend too much time messing with it though,
I think the screen mirroring built in is via DLNA to a Smart TV or other DLNA receiver.
raitchison said:
I tried it with a monoprice adapter and it did not work, I did not spend too much time messing with it though,
I think the screen mirroring built in is via DLNA to a Smart TV or other DLNA receiver.
Click to expand...
Click to collapse
The specs say wired HDMI also so I am hoping the Tab 3 cable works. Is your adaper 5 pin or 11 pin, powered or unpowered. From what I have been reading the cable MUST be plugged in to USB power in addition to the tab for it to work. This is the one I have on order.
http://www.ebay.ca/itm/151312595134?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
macbroom said:
The specs say wired HDMI also so I am hoping the Tab 3 cable works. Is your adaper 5 pin or 11 pin, powered or unpowered. From what I have been reading the cable MUST be plugged in to USB power in addition to the tab for it to work. This is the one I have on order.
http://www.ebay.ca/itm/151312595134?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Click to expand...
Click to collapse
Yeah my adapter is powered but I did not have it plugged into USB. I'll try it again.
So does the Tab 4 (specificly the 8.0) support HDMI out? I notice that the US website and Best Buy mentions HDMI, but the canadian samsung website doesn't mention it.
The MLH cable I got from China does NOT work. I do have hope for the future. There are no HDMI adapters available from Samsung at this time even though they say wired HDMI is supported with an adapter that they have not made available yet! I believe the hardware support is there but it is not implemented in the TouchWiz software.
macbroom said:
The MLH cable I got from China does NOT work. I do have hope for the future. There are no HDMI adapters available from Samsung at this time even though they say wired HDMI is supported with an adapter that they have not made available yet! I believe the hardware support is there but it is not implemented in the TouchWiz software.
Click to expand...
Click to collapse
Hi I tried several adapters ordered by Amazon including this one Samsung ET-H10FAUWEGWW but no chance of getting HDMI a signal out.
Therefore I contacted Samsung using the Smart Tutor app of samsung and unfortunately after remote examining the device, they confirmed that MHL is NOT supported by this device. However this might apply only to the European versions.
So what, now I am so disappointed?! Does anybody know if Samsung maybe deactivated this feature in their ROMs, if so maybe we could get
HDMI out with a custom ROM in the future.
kind regards
Mjay
My first post!
I had this chat with a Samsung specialist a few weeks ago:
info: Please wait for a Samsung Agent to respond.
info: You are now chatting with 'Shawn'. There will be a brief survey at the end of our chat to share feedback on my performance today.
info: Your Issue ID for this chat is LTK1125601075630X
Shawn: Hi, thanks for reaching out to Samsung pre sales support. We appreciate your interest in Samsung products. How may I assist you today?
Visitor: I am wondering which of the tablets support HDMI output
Shawn: I understand that you are looking for the TVs that support HDMI output. Certainly, I will help you with the information.
Visitor: Not tvs that support HDMI, but Tables, such as the galaxy tab 4 10.1
Visitor: i mean tablets
Shawn: Sorry for the mis-communication.
Visitor: no problem
Shawn: You could use the HDMI adapter with Tab 4 10.1.
Visitor: Which adapter? None of the adapters that i have found say they specifically support that model. Plus, as I I trying to decide twich model (7, 8, or 10 inch, I am not able to find out which models support HDMI, and the adapter that is required
Shawn: Please check the below link for compatible devices that support the HDMI adapter which is used to connect the Tab to the TV.
Shawn: go to Samsung dot com /us/mobile/galaxy-tab-accessories/ET-H10FAUWEGUJ-compatible
Shawn: Are you able to access the above link?
Visitor: Yes. If it states that it is compatible with the tab 3, does that mean it is also compatible with the tab 4? The tab 4 is not listed.
Shawn: Tab 4 has been recently released. Hence, it isn't listed under the compatible devices. It should also support the adapter.
Visitor: ok, thanks
Shawn: You're welcome. Is there anything else that I can assist you with?
Visitor: No, that is all, thanks again
Shawn: Thanks for chatting with Samsung Support. If you have a minute, please click on the blue ?X close? button to receive the transcript of your chat and fill out a brief survey to help us serve you better.
Follow Samsung Service on Facebook, Twitter and YouTube.
info: Chat session has been terminated by the Samsung Agent.
You have to be careful in choosing an adapter for these. The following one did NOT work for my tab 4 10.1:
Go to amazon dot com/gp/product/B00ESM3Q7K/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
But this one specifically says it does, and comments seem to confirm it:
Go to amazon com/gp/product/B00KGP5SEC/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1
I have one on order, and I will post my results when I get it and try it.
Eric
I wish you luck with the second cable you mentioned, but I read all 24 pages of reviews for it and the Tab 4 is not mentioned as working in any review. Half the reviews say it doesn't even work with the devices listed!
Most CS staff have very little technical knowledge. I would not put one bit of faith in a CS rep saying, oh it's not listed in the adapter specs but it should work...lol.
I would lay odds that wired HDMI out is not implemented in the kernel we have now. There are a few reports here that people lost wired HDMI out on Tab 3 after the Kit Kat update.
Well, I would think that the tab 4 would be supported as the tab 3 was, but that is why I am getting the cheap adapter rather than the official Samsung one (that one is around $75 on Amazon, but $35-$39 elsewhere). Having been in IT, I have found that most of the problems that people have are self induced, i.e. they did not read the instructions, or took shortcuts. It is worth noting that there seems to be two Samsung MHL adapters, one for the phones and one for the tablets. I do not know why they would do that, it does not make sense to me, as it causes too much confusion.
Eric
Samsung has a history of changing cables and adapters for various devices as this page explains better than most.
http://blog.clove.co.uk/2013/03/28/which-mhl-cable-should-i-buy/
I figure that they want to sell some $100 AllShare Cast dongles before they introduce an new hardware keyed 11 pin micro USB adapter!
I can confirm that my Canadian Tab 4 8.0 has the Samsung 11 pin micro USB jack.
I tried again after reading the reviews of that cable.....reboot both devices...powered from Tab 4 power wart....changed HDMI inputs on TV....screen mirroring on/off......NADA.....
Well, the Tab 4 does not support MHL. At the moment anyway. My 10.1 does have the 11 pin connector, AFAICT, but I get no results when plugging a cable in. BTW macbroom, my last post was not directed at you, just those who buy something and don't read the directions.
Eric
I recently purchased a AUVIO MHL adapter ( male micro USB to female HDMI) for my Galaxy Tab 4 10.1 (sm-t530nu). It uses a external power supply and also included the Samsung 11 pin adapter. I had read on a website that it does support MHL so I didn't think it would be an issue. However, it did NOT work and I tried with and without the adapter. After some browsing I found a miracast/allshare dongle on amazon for 22$ with free shipping and it works like a charm for the screen mirroring. I did notice while browsing that best buy had a "accessory kit" for the tab 4 10.1 that included a wall/car charger, OTG cable, and a MHL adapter. It was a dongle that plugged into your TV HDMI port and had a USB port that you connected the tab 4s charger to. So maybe it does support it and they just made changes to the connectors pins. It may have just been a mislabeled product also, who knows.
HDMI for Tab 4s
I, too have been attempting to get my new Tab 4 10.1 to display via HDMI. And, like others, have had less than helpful information from Samsung's CSRs.
The setup I use with my Samsung S5 phone doesn't seem to work for my tablet, regardless of the order in which I hook everything up
I read elsewhere that the issue was related to the 5-pin vs. 11-pin connection, but adding an adapter for that in the mix didn't work either.
I'm not familiar with the Miracast/Allshare dongle - but that plugs into the TV, right? I had hoped to be able to display movies to a TV while on vacation, so won't know what type of TV (or associated ports) might be available...
I've found this EEEKit which is listed for the Tab 4 (bestbuy dot com/site/eeekit-bundle-3-in-1-for-samsung-galaxy-tab-4-10-1-t530mhl-to-hdmi-cable-otg-cable-sync-cable/1311158404.p?id=mp1311158404&skuId=1311158404&st=eeekit%20hdmi%20%22tab%204%22&cp=1&lp=1#tab=buyingOptions ) but no comments or reviews yet.
So, does this Tab 4 go back to the store?
As a side note: Does anyone else find that a tablet released several months ago is still considered "too new" to have accessories? Especially with a feature (HDMI and screen mirroring) that isn't new? Geesh!
calail said:
I, too have been attempting to get my new Tab 4 10.1 to display via HDMI. And, like others, have had less than helpful information from Samsung's CSRs.
...So, does this Tab 4 go back to the store?
As a side note: Does anyone else find that a tablet released several months ago is still considered "too new" to have accessories? Especially with a feature (HDMI and screen mirroring) that isn't new? Geesh!
Click to expand...
Click to collapse
As much as I hate to say it, the new Tab 4 is going back to the store! I spent some time at Best Buy with their in-store Samsung rep, who made calls to *SOMEWHERE* to verify that the Tab 4 IS NOT COMPATIBLE with MHL connections. He tells me, the only way to disply your Tab screen on a TV is through AllShare Cast. Of course, he was willing to sell me their $65 connector! Since I've already purchased MHL adapters to use with my phones, I really don't want to invest in something else for the Tab. Just not that important.
Don't forget that the Allshare Cast dongle checks the flash counter and other things and thus will not work on a rooted Tab 4 or any other device. Sadly nobody has figured out how to patch out the check yet despite it being a problem for quite a while.
nl3142 said:
Don't forget that the Allshare Cast dongle checks the flash counter and other things and thus will not work on a rooted Tab 4 or any other device. Sadly nobody has figured out how to patch out the check yet despite it being a problem for quite a while.
Click to expand...
Click to collapse
What do you mean? Im rooted and mine works flawless..
lwg45714 said:
What do you mean? Im rooted and mine works flawless..
Click to expand...
Click to collapse
Well it definitely does on the Galaxy S3. I couldn't get it working at all, searched the forums here, and found that information. Oh, and did your rooting change the flash counter or the official/custom status at all?
nl3142 said:
Well it definitely does on the Galaxy S3. I couldn't get it working at all, searched the forums here, and found that information. Oh, and did your rooting change the flash counter or the official/custom status at all?
Click to expand...
Click to collapse
Ohh okay, you mean that Knox nonsense. No, sorry I didn't understand what you mean't by that. Sorry ive only owned a samsung for a few weeks. Ive only had a Atrix HD so im use to flashing until my hearts content with no repercussion. However, Towelroot doesn't change the counter on the TAB 4 so simply rooting shouldn't be a problem if done correct. That's pathetic however, they really take away someone's ability to cast their screen because they enjoy modding/ flashing their devices? Terrible road to choose for a company with such nice devices.
Well, the good thing is that Chromecast does work on the Tab 4's. The bad news is that screen mirroring is in beta, and only supported on a few devices, officially. If you search for 'Enable Mirroring from any device', you will fine a thread on how to mirror from almost any unit via chromecast. Even though it is beta, it works on my Tab 4.
Eric