Lucio composed on 2018-09-03 08:52 (UTC+0200): > I have two different Debian Buster/sid systems. The first is a desktop > PC with AMD RX 580 graphics. It used to work ok until July, then I > updated it sometime in August, and Xorg broke.
> The second is an Acer Aspire5 notebook I've just bought, with AMD RX 540 > graphics. I've installed Debian using the latest Debian Buster testing > ISO (August 27th, as today's one wasn't available yet), and Xorg doesn't > start. > Both Xorg.0.log show the same error: > Fatal server error: > Cannot run in framebuffer mode please supply the busIds for all > framebuffer devices > Both systems run the 4.17 amd64 kernel, but I've also tried a custom > 4.18 kernel on the desktop system, with the same results. > I could find a number of references to that error out there, but all of > them point either to a solution that does not work in my cases (e.g. > adding "amdgpu.cik_support=1 radeon.cik_support=0" to the kernel > comdline) or to a old and already closed bug report, (e.g. > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=508476) > I'd suspect fbdev was somehow guilty, but the fbdev module isn't even > listed by lsmod. fbdev is an xorg driver provided by xserver-xorg-video-fbdev, not to be confused with the kernel's framebuffer, /dev/fb0. > I've already tried creating a /etc/X11/xorg.conf file, using > # Xorg -configure That's an anachronism rarely useful for any purpose any more. > but it didn't solve the problem. Does /dev/fb0 exist? If not, likely you are missing firmware the AMD gfxcards depend on, most likely firmware-amd-graphics. -- "Wisdom is supreme; therefore get wisdom. Whatever else you get, get wisdom." Proverbs 4:7 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/
