Am 24.10.22 um 13:31 schrieb Thomas Zimmermann:
Hi
Am 24.10.22 um 13:27 schrieb Greg KH:
On Mon, Oct 24, 2022 at 12:41:43PM +0200, Thorsten Leemhuis wrote:
Hi! Thx for the reply.
On 24.10.22 12:26, Thomas Zimmermann wrote:
Am 23.10.22 um 10:04 schrieb Thorsten Leemhuis:
I noticed a regression report in bugzilla.kernel.org. As many (most?)
kernel developer don't keep an eye on it, I decided to forward it by
mail. Quoting from
https://bugzilla.kernel.org/show_bug.cgi?id=216616 ; :
Andreas 2022-10-22 14:25:32 UTC
Created attachment 303074 [details]
dmesg
I've looked at the kernel log and found that simpledrm has been loaded
*after* amdgpu, which should never happen. The problematic patch has
been taken from a long list of refactoring work on this code. No wonder
that it doesn't work as expected.
Please cherry-pick commit 9d69ef183815 ("fbdev/core: Remove
remove_conflicting_pci_framebuffers()") into the 6.0 stable branch and
report on the results. It should fix the problem.
Greg, is that enough for you to pick this up? Or do you want Andreas to
test first if it really fixes the reported problem?
This should be good enough. If this does NOT fix the issue, please let
me know.
Thanks a lot. I think I can provided a dedicated fix if the proposed
commit doesn't work.
Best regards
Thomas
thanks,
greg k-h
Thanks... In short: the additional patch did NOT fix the problem.
I don't use git and I don't know how to /cherry-pick commit/
9d69ef183815, but I found the patch here:
https://patchwork.freedesktop.org/patch/494609/
I hope that's the right one. I reintegrated
v2-07-11-video-aperture-Disable-and-unregister-sysfb-devices-via-aperture-helpers.patch
and also applied
v2-04-11-fbdev-core-Remove-remove_conflicting_pci_framebuffers.patch,
did a "make mrproper" and thereafter compiled a clean new 6.0.3 kernel
(same .config).
Now the system doesn't even boot to a console. The first boot got me to
a rcu_shed stall on CPUs/tasks, same as above, but this time with:
Workqueue: btrfs-cache btrfs_work_helper
I booted a second time with the same kernel, and it got stuck after
mounting the root btrfs filesystem (what looked like a total freeze, but
when it didn't show a rcu_stall message after ~2 min I got impatient and
wanted to see if I had just busted my root filesystem...)
I booted 6.0.2 and everything is fine. (I'm very glad! I definitely
should update my backup right away!)
I will try 6.1-rc1 next, bear with...
