| Bug ID | 111261 |
|---|---|
| Summary | Screen remains black when 2 monitors are connected |
| Product | DRI |
| Version | DRI git |
| Hardware | Other |
| OS | All |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu-pro |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | fabstz-it@yahoo.fr |
With 2 monitors (one on VGA, one on DVI-D), screen turns black= while loading system in console When only 1 monitor connected to VGA everything is fine. There is no problem with kernel 5.2 or with amdpgu-dkms 19.10 on debian bus= ter (linux 4.19) It happens only with amdpgu-dkms 19.20 or 19.30 (on debian buster - kernel 4.19) For 19.20 I applied my patch from https://bugs.freedesktop.org/show_bug.= cgi?id=3D111103, which is merely the same as the code in 19.30
Bug still present in amdgpu-pro-19.30-855429-ubuntu-18.04 Last working version is amdgpu-pro-19.10-785425-ubuntu-18.04
Please attach your xorg log (if using X) and your dmesg output= . What GPU are you using?
Thanks for your interest in that issue. How could I do that with nothing visible on my monitors ? Is there any parameter I can add to the kernel to keep a log ?
Created attachment 14= 5098 [details] System information (part1) Please find attached: - basic configuration details. - addition information As instructed here : https://amdgpu-install.readthedocs.io/en/latest/install-bugrep.html
Created atta=
chment 145101 [details]
System information (part2 =3D logs)
I could get the logs/info through SSH
There was no Xorg.log probably because the system didn't start X
There is no dedicated GPU on my system but an APU/CPU with integrated graph=
ics
:=20
"AMD Athlon 200GE with vega graphics"
BTW, running kernel 5.2.x was fine (both monitors had something displayed)<=
/pre>
The issue seems to be related to these calls in file
amdgpu-19.30-855429/amd/display/amdgpu_dm/amdgpu_dm.c
twice:
kcl_drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
once:
kcl_drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux,
aconnector->edid);
If I delete them the display works also with 19.30
| What | Removed | Added |
|---|---|---|
| Status | NEW | RESOLVED |
| Resolution | --- | MOVED |
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this = link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/36.