Created attachment 141539 [details] Xorg.0.log including the segfoult History (maybe only partly related to the problem): I followed this guide to update my drivers: https://github.com/ValveSoftware/Proton/blob/proton_3.7/PREREQS.md sudo add-apt-repository ppa:paulo-miguel-dias/mesa sudo apt dist-upgrade sudo apt install mesa-vulkan-drivers mesa-vulkan-drivers:i386 which worked fine for some days. I updated my system as normal (via apt) and after a reboot the machine came up with a black screen. I found a segfault in my Xorg.0.log (attached). Blacklisting the module "amdgpu" lets me boot into the desktop using only the integrated Intel GPU. Some information that are hopefully helpful: $ lspci -k 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) Subsystem: Dell HD Graphics 620 Kernel driver in use: i915 Kernel modules: i915 01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260/M265 / M340/M360 / M440/M445] (rev c3) Subsystem: Dell Radeon R7 M445 Kernel modules: amdgpu $ uname -a Linux notebook-kai 4.15.0-34-generic #37-Ubuntu SMP Mon Aug 27 15:21:48 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux My PC is a notebook with an integrated Intel GPU and a dedicated AMD GPU. OS is Linux Mint 19 Cinnamon CPU is Intel© Core™ i7-7500U CPU @ 2.70GHz × 2 What else is needed? Can I somehow re-install or downgrade the amdgpu-drivers?
Please also attach the corresponding dmesg output. Please install the xserver-xorg-video-amdgpu-dbg package, attach a new Xorg log file from running with that installed, and either get a backtrace with gdb (per https://www.x.org/wiki/Development/Documentation/ServerDebugging/), or provide the output of the following commands: addr2line -e /usr/lib/xorg/modules/drivers/amdgpu_drv.so 0x7f9e326d3000+0x17305 addr2line -e /usr/lib/xorg/modules/drivers/amdgpu_drv.so 0x7f9e326d3000+0xedfd For the time being, assuming there are no display connectors on the AMD GPU (that you need to use), you can avoid the problem by putting this in /etc/X11/xorg.conf: Section "ServerFlags" Option "AutoAddGPU" "off" EndSection
I was able to reproduce the crash (it only happens when the kernel driver doesn't expose any display outputs), https://patchwork.freedesktop.org/patch/249254/ fixes it.
Thanks for the report, fixed in Git master: commit 6572be49b713a26eca14f16e1854cabf28101288 Author: Michel Dänzer <michel.daenzer@amd.com> Date: Thu Sep 13 11:44:21 2018 +0200 Bail from drmmode_cm_init if there's no CRTC
Thanks a lot for the fix, that was pretty quick! Is any of the requested information still relevant? Maybe for documentation purpose?
(In reply to freedesktop from comment #4) > Is any of the requested information still relevant? Maybe for documentation > purpose? Thanks for asking, but it's not needed anymore.
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.