[Warning] Broken kernel incoming for AMD users

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1

Hello.

I really hope this post won’t have a long life. I noticed there is a bug in both linux kernel 5.6.5 and 5.4.33 LTS. If you’re running a computer with an AMD GPU, you won’t be able to reboot or stop it cleanly.

As of April 19th, 2020, both kernels are on testing. I opened a bug on Archlinux tracker : https://bugs.archlinux.org/task/66305

This bug is known upstream and a patch is available: https://bugzilla.kernel.org/show_bug.cgi?id=207331

So, let’s hope Archlinux won’t push both 5.6.5 and 5.4.33 LTS kernels into core repository without a patch. Or maybe until 5.6.6 and 5.4.34 LTS.

14 Likes
2

Thanks for the warning!
This surely is IMPORTANT news for the AMD GPU users!

4

The kernel with the patch applied is already available in testing.

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5

So… it should be OK when it arrives to the stable repo.

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Well, not really.

Looking at linux package changes:

https://git.archlinux.org/svntogit/packages.git/log/trunk?h=packages/linux

Last commit:

https://git.archlinux.org/svntogit/packages.git/commit/trunk?h=packages/linux&id=fdf9d6f7ce59ea8e64911c1a1e7992026b57f552

It is related to an option changed to module. Fixing patch is not included.

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7

Thanks.
I also wondered after looking at the latest patches that the fix for AMD GPU wasn’t there.

1 Like
8

Looks like the bug is now getting worked on. I think a new kernel version will be available soon.

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10

I’m running an AMD with integrated Radeon GPU. Does this mean I should wait to run an update on the kernel? Also, I noticed everything except the cursor would freeze (unresponsive to launching new programs) when booting from USB, however I managed a workaround by using [Tab] to edit grub startup option from radeon.modeset=0 to radeon.modeset=1. I don’t know if anyone else has had this problem or where it would be more appropriate to post it, so I posted it here as an addendum to my original reply-question.

11

Archlinux bug is closed, so this issue should be dead now.

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12

it get booted here :slight_smile: works…5.6.5-zen3

13

Running 5.6.41 and nary a problem.

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Ah… okay. I’ll search the forum to see if anyone else had a similar issue with booting a Live USB then. Thanks!