Bug 202667
Summary: | amdgpu fails to boot: atombios stuck executing D6A0 | ||
---|---|---|---|
Product: | Drivers | Reporter: | Dennis Wagelaar (dwagelaar) |
Component: | Video(DRI - non Intel) | Assignee: | drivers_video-dri |
Status: | RESOLVED INVALID | ||
Severity: | normal | ||
Priority: | P1 | ||
Hardware: | x86-64 | ||
OS: | Linux | ||
Kernel Version: | 4.20.5 | Subsystem: | |
Regression: | No | Bisected commit-id: | |
Attachments: |
journalctl --no-hostname -k for kernel-4.20.4-100.fc28.x86_64
journalctl --no-hostname -k for kernel-4.20.5-100.fc28.x86_64 Active kernel module parameters for 4.20.4 journalctl --no-hostname -k for kernel-4.20.8-100.fc28.x86_64 with amdgpu.dc=1 |
Description
Dennis Wagelaar
2019-02-24 10:27:22 UTC
Please attach the corresponding full output of dmesg. Can you bisect between 4.20.4 and 4.20.5? Created attachment 281333 [details]
journalctl --no-hostname -k for kernel-4.20.4-100.fc28.x86_64
Created attachment 281335 [details]
journalctl --no-hostname -k for kernel-4.20.5-100.fc28.x86_64
The attached output from 4.20.4 shows DC being enabled. Does the problem really not happen with 4.20.4 and DC disabled? Created attachment 281337 [details]
Active kernel module parameters for 4.20.4
Hmm, I have:
options amdgpu dc=0
in /etc/modprobe.d/amdgpu.conf, but my active module parameters say DC is enabled anyway...
Created attachment 281339 [details] journalctl --no-hostname -k for kernel-4.20.8-100.fc28.x86_64 with amdgpu.dc=1 Just found out changing stuff in /etc/modprobe.d/ has no effect until the next run of dracut :$ It turns out I can no longer use amdgpu without DC=1. With that enabled, the newer kernel run as normal. What probably happened is that I saw the flicker once, which is mentioned here: https://wiki.archlinux.org/index.php/AMDGPU : "If you experience flickering add amdgpu.dc=0 to your kernel parameters." That's when trouble began. |