I have a PC with: MB: Asrock AM1B-ITX CPU: AMD Kabini Athlon 5350 APU iGPU: Radeon HD 8400 / R3 Series Displays: DVI Asus, HDMI Samsung Kernels: 4.12/4.14/4.15/4.16/4.17 Drivers: radeon, amdgpu, amdgpu-dc Booting in UEFI mode, EFIFB/SimpleFB When the drm driver is loaded on system boot or when is loaded manually the screen goes blank. The screen content reappears after the driver has been loaded. I assume switching from efifb/simblefb to radeon/amdgpudrmfb causes this.
Please attach your xorg log and dmesg output. What display connectors are on your system and which are you using? Are you using DVI and HDMI at the same time?
Created attachment 140984 [details] xorg log
Created attachment 140985 [details] dmesg The mainboard has two video ports, DVI and HDMI. I use the DVI port. I can test the HDMI port too if that helps.
(In reply to Sebastian Luncan from comment #0) > When the drm driver is loaded on system boot or when is loaded manually the > screen goes blank. The screen content reappears after the driver has been > loaded. So this report is about the screen temporarily blanking while the driver initializes? If so, that's not really a bug, getting rid of that would be an enhancement.
(In reply to Michel Dänzer from comment #4) > So this report is about the screen temporarily blanking while the driver > initializes? If so, that's not really a bug, getting rid of that would be an > enhancement. Yes. I didn't know that's how AMD drivers load. Starting with 4.14 there's also a screen wide artifact when loading the driver so I thought the screen blanking is a bug.
(In reply to Sebastian Luncan from comment #5) > Starting with 4.14 there's also a screen wide artifact when loading the > driver [...] Those artifacts should be fixed as of 4.18.
(In reply to Michel Dänzer from comment #6) > Those artifacts should be fixed as of 4.18. OK, thanks.
-- 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/472.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.