https://bugzilla.kernel.org/show_bug.cgi?id=108221
--- Comment #14 from Fred Santos <frederic.santos at u-bordeaux.fr> --- (In reply to Michel Dänzer from comment #10) > (In reply to Fred Santos from comment #9) > > (Is there a way to 'force' the use of amdgpu?) > > Yes, you can force it in Section "Device" in /etc/X11/xorg.conf . If there > is no such file yet, creating it with only something like this should work: > > Section "Device" > Identifier "Device0" > Driver "amdgpu" > EndSection I compiled and booted some old kernels, and here are my observations: 1. Even when booting with old kernels that should have worked fine (e.g., 4.2), the problem persists... 2. We found (Comment #10) that amdgpu was not found/activated during boot: when 'forcing' its use by creating this /etc/X11/xorg.conf file, everything is OK, with all kernels I have tested (4.4, 4.3, 4.2). To put it in a nutshell, no matter the kernel we use, we have the same behavior: it works if and only if we add this /etc/X11/xorg.conf file. Maybe an Xorg autodetection problem that doesn't come from the kernel itself? (Is it possible?) -- You are receiving this mail because: You are watching the assignee of the bug.
