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 buster (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=111103, 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 145098 [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 attachment 145101 [details] System information (part2 = 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 graphics : "AMD Athlon 200GE with vega graphics" BTW, running kernel 5.2.x was fine (both monitors had something displayed)
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
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