I got now the display corruption with alpha3, after 2 days of testing. Will now continue with alpha2...
Display corruption with Kernel 5.10 and 5.12
Re: Display corruption with Kernel 5.10 and 5.12
- Roland -
Re: Display corruption with Kernel 5.10 and 5.12
I have been using alpha2 during several days but have not seen the screen corruption... Is there in alpha3 any change which could potentially be the source of this issue?
- Roland -
Re: Display corruption with Kernel 5.10 and 5.12
I think the issue is somewhere in the PowerPC updates 5.10-1.
Please look in the PowerPC updates 5.10-1.
We can do a git bisect but this is really a lot of work for us. We have to compile at least 12 kernels and you have to test them because I don't have these issues. And your test per kernel takes a long time.
http://www.amigalinux.org
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
Re: Display corruption with Kernel 5.10 and 5.12
Is there any other choise to find the origin of this issue...? Are these test kernels in other respect functional? Alpha2 has been so far totally stable, no other issues. For me there is not much extra work if I can just use them until the problem appears, or does not.xeno74 wrote: ↑Tue Sep 21, 2021 10:44 am
I think the issue is somewhere in the PowerPC updates 5.10-1.
We can do a git bisect but this is really a lot of work for us. We have to compile at least 12 kernels and you have to test them because I don't have these issues. And your test per kernel takes a long time.
- Roland -
Re: Display corruption with Kernel 5.10 and 5.12
Yes, please look in the PowerPC updates 5.10-1. Maybe you find a suspicious commit. If you have found a suspicious commit, then I can try to remove the changes.
Yes, I tested them intensiveley and other tested these intensively too. (See test thread)
http://www.amigalinux.org
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
Re: Display corruption with Kernel 5.10 and 5.12
I have not found anything obvious but any change which has something to do with memory is suspicious to me:
- Addition of a filter for RTAS (firmware) calls done via sys_rtas(),
to prevent root from overwriting kernel memory.
But I'm afraid we need to do it through the long path...
Alpha2 has still worked without problems (I have run several livestreams etc. with it), so it is quite sure the issue appeared in alpha3.
- Roland -
Re: Display corruption with Kernel 5.10 and 5.12
OK, let's do it ...
-
Code: Select all
git bisect start
- (Good: Linux 5.9)
Code: Select all
git bisect good bbf5c979011a099af5dc76498918ed7df445635b
- (Bad: Linux 5.10-rc1)
Code: Select all
git bisect bad 3650b228f83adda7e5ee532e2b90429c03f7b9ec
Output:Code: Select all
[c48b75b7271db23c1b2d1204d6e8496d91f27711] Merge tag 'sound-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Please test it.
http://www.amigalinux.org
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
Re: Display corruption with Kernel 5.10 and 5.12
I tested rb1 today with intensive and various streaming/browser sessions... No sign of problems. I think we could already test the next set...
- Roland -
Re: Display corruption with Kernel 5.10 and 5.12
OK, git bisect good
Output:
Code: Select all
[847d4287a0c6709fd1ce24002b96d404a6da8b5b] Merge tag 's390-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Please test it.
http://www.amigalinux.org
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
http://www.supertuxkart-amiga.de
Running Linux on AmigaONEs can require some tinkering.
Re: Display corruption with Kernel 5.10 and 5.12
Testing it now... But can you tell me how this bisect method exactly goes? If the rb1 was ok, should the issue now be seen with rb2?
- Roland -