[Q] Phone screen error

[basjke]

Hi all, this is my first post in this forum.

I own a rooted Samsung Gt-N7000 with KK custom rom.

Before it was rooted, I would experience that if there was some pressure on the phone, because it was in my pocket and I bended my legs, the phone would reboot.

I checked it out manually by trying to apply pressure on the screen or trying to bend it, and the result was always that the screen would flicker for a second and right away reboot.

Now fast forward to after I rooted the phone. At that point the phone wouldn't automatically reboot anymore, but I would pull it out of my trouser pocket and the screen would be off. The only way to reset it would be to hold the power button for an extended time or remove the battery.

I tested it again the same way I did before it was rooted, and it would also give the screen flicker but not automatically reboot anymore.

Next I started to notice that after I manually rebooted, it would reboot normal but as soon as the boot image started to appear it would give the same screen error.

All small lines in different colors or a single horizontal white line which moved over the screen. I could boot into TWRP recovery and the screen would look normal and touch would work, but as soon as I the system boot image appeared the screen would go in error.

This is an example of how my phone screen looked ( this is not my phone)

I did a clean reinstall from the ROM, whereby wiping everything, but same result.

Then I went into the mount section of the recovery and noticed that EFS-System and data were not mounted. So I ticked them, reboot and everything is fine.

The following times I experienced the error it was exactly same. Rebooting or re-flashing ROM would give no positive result, only after going into the mount tab and tick EFS-system and data and reboot the problem is solved.

Any advise what is happening will be much appreciated.

 

[Hannah Stern]

Hi all, this is my first post in this forum.

I own a rooted Samsung Gt-N7000 with KK custom rom.

Before it was rooted, I would experience that if there was some pressure on the phone, because it was in my pocket and I bended my legs, the phone would reboot.

I checked it out manually by trying to apply pressure on the screen or trying to bend it, and the result was always that the screen would flicker for a second and right away reboot.

Now fast forward to after I rooted the phone. At that point the phone wouldn't automatically reboot anymore, but I would pull it out of my trouser pocket and the screen would be off. The only way to reset it would be to hold the power button for an extended time or remove the battery.

I tested it again the same way I did before it was rooted, and it would also give the screen flicker but not automatically reboot anymore.

Next I started to notice that after I manually rebooted, it would reboot normal but as soon as the boot image started to appear it would give the same screen error.

All small lines in different colors or a single horizontal white line which moved over the screen. I could boot into TWRP recovery and the screen would look normal and touch would work, but as soon as I the system boot image appeared the screen would go in error.

This is an example of how my phone screen looked ( this is not my phone)

I did a clean reinstall from the ROM, whereby wiping everything, but same result.

Then I went into the mount section of the recovery and noticed that EFS-System and data were not mounted. So I ticked them, reboot and everything is fine.

The following times I experienced the error it was exactly same. Rebooting or re-flashing ROM would give no positive result, only after going into the mount tab and tick EFS-system and data and reboot the problem is solved.

Any advise what is happening will be much appreciated.

This is a GT.i9300 or i9305, not N7000.
EDIT: I SEE, this is not your phone.
Sorry for my mistake

However, BACK UP ALL DATA Before doing anything.
Then you can root/unroot/reinstall/up or downgrade as much as you like.

 

[basjke]

I understand the OP is lengthy and since English is not my native language it may be confusing, but I think you missed the point of my question, which is that the phone is rooted already with a custom ROM installed.

I have searched a bit more in the mean time and it sounds as if the EMMC chip is the cause of my problem. I have the affected chip in my phone, but I understand that the available patch is to prevent sudden death. I don't know if the patch also resolves the screen issue.

My understanding is that I have applied the patch by installing the latest Lanchon kernel with TRIM FPBug and have the latest Slimsaber ROM installed which to my understanding has the patch integrated as well.

Please correct me if I'm wrong.

 

[Hannah Stern]

I understand the OP is lengthy and since English is not my native language it may be confusing, but I think you missed the point of my question, which is that the phone is rooted already with a custom ROM installed.

I have searched a bit more in the mean time and it sounds as if the EMMC chip is the cause of my problem. I have the affected chip in my phone, but I understand that the available patch is to prevent sudden death. I don't know if the patch also resolves the screen issue.

My understanding is that I have applied the patch by installing the latest Lanchon kernel with TRIM FPBug and have the latest Slimsaber ROM installed which to my understanding has the patch integrated as well.

Please correct me if I'm wrong.

In order to make me read your posts, please quote my message or mention me .

Thanks

 

[basjke]

In order to make me read your posts, please quote my message or mention me .

Thanks

Thanks for pointing out, but as I said I'm a very recent member, so I will have to learn.

So since you have read my post now, can you please tell me if I'm correct or not in the assumptions I made in my previous post

 

[Hannah Stern]

Thanks for pointing out, but as I said I'm a very recent member, so I will have to learn.

So since you have read my post now, can you please tell me if I'm correct or not in the assumptions I made in my previous post

That's no problem

 

[basjke]

That's no problem

So I have read up more on the issue and the eMMC chip I have installed is the VYL00M rev 0x19.

According to the Cyanogen wiki my chip may be affected with the wear leveling bug.

This problem also occurs in fwrev 0x19, but has not been observed there, and is in any event far less severe than the infamous "Superbrick" secure erase bug, as the user only needs to perform a wipe data/factory reset operation to recover.

There is a patch from Samsung which is here.

https://android.googlesource.com/kernel/omap/+/3c57a612f12b069bbc863ec0c74a26850d76a9e8^!/

Only thing is that it is Chinese to me as how to apply the patch. Can someone help me with instructions how to apply the patch?

 

[Hannah Stern]

So I have read up more on the issue and the eMMC chip I have installed is the VYL00M rev 0x19.

According to the Cyanogen wiki my chip may be affected with the wear leveling bug.

This problem also occurs in fwrev 0x19, but has not been observed there, and is in any event far less severe than the infamous "Superbrick" secure erase bug, as the user only needs to perform a wipe data/factory reset operation to recover.

There is a patch from Samsung which is here.

https://android.googlesource.com/kernel/omap/+/3c57a612f12b069bbc863ec0c74a26850d76a9e8^!/

Only thing is that it is Chinese to me as how to apply the patch. Can someone help me with instructions how to apply the patch?

If you Factory-Reset the phone, all data gets completely lost so do a backup before doing anything.

 

[basjke]

If you Factory-Reset the phone, all data gets completely lost so do a backup before doing anything.

I understand that but with the patch applied my problems should be solved, at least that is my understanding, so I would not need to factory reset the phone anymore.
Problem is that I have no idea how to apply the patch.

Also take note that factory reset and re-flash ROM doesn't solve my problem.

To solve my screen problem I have to go into the mount tab of the TWRP recovery, tick EFS - DATA _ SYSTEM, and reboot.

This works even without factory reset or reinstall the ROM.

 

[Hannah Stern]

I understand that but with the patch applied my problems should be solved, at least that is my understanding, so I would not need to factory reset the phone anymore.
Problem is that I have no idea how to apply the patch.

Also take note that factory reset and re-flash ROM doesn't solve my problem.

To solve my screen problem I have to go into the mount tab of the TWRP recovery, tick EFS - DATA _ SYSTEM, and reboot.

This works even without factory reset or reinstall the ROM.

Ok, i see.