I'm not entirely sure if this is related, but I'm also having the same error and games that rely on opengl stoped working since (~02/03/2018 - dd-mm-yyyy):
I have an AMD Radeon HD 7850 installed. It seems to be related to the xorg update or the other ones around (please see attachment): /var/log/apt/history xserver-xorg-core:amd64 (2:1.19.6-1ubuntu1, 2:1.19.6-1ubuntu2) /var/log/kernel Mar 15 19:21:22 dktp kernel: [ 2.118654] [drm] VGACON disable radeon kernel modesetting. Mar 15 19:21:22 dktp kernel: [ 2.118687] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! Mar 15 19:21:22 dktp kernel: [ 2.216849] [drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting. Making a basic tests, it seems to perform better with software rendering... ?!? $ glxgears -info GL_RENDERER = AMD PITCAIRN (DRM 2.50.0 / 4.15.0-11-generic, LLVM 5.0.1) GL_VERSION = 3.0 Mesa 18.0.0-rc4 GL_VENDOR = X.Org (...) VisualID 1064, 0x428 355 frames in 5.0 seconds = 70.940 FPS 300 frames in 5.0 seconds = 59.997 FPS $ LIBGL_ALWAYS_SOFTWARE=1 glxgears -info GL_RENDERER = llvmpipe (LLVM 5.0, 128 bits) GL_VERSION = 3.0 Mesa 18.0.0-rc4 GL_VENDOR = VMware, Inc. (...) VisualID 1064, 0x428 6604 frames in 5.0 seconds = 1320.753 FPS 6758 frames in 5.0 seconds = 1351.475 FPS Further details: $ xdpyinfo | grep DRI DRI2 DRI3 $ lspci -k | grep -EA3 'VGA|3D|Display' 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850 / R7 265 / R9 270 1024SP] Subsystem: PC Partner Limited / Sapphire Technology Radeon HD 7850 2GB GDDR5 DVI-I/DVI-D/HDMI/DP Kernel driver in use: radeon Kernel modules: radeon, amdgpu Can anyone help? ** Attachment added: "Radeon.issue" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1756324/+attachment/5082513/+files/Radeon.issue -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1756324 Title: No signal after upgrading on 18.04 Status in xorg package in Ubuntu: Confirmed Bug description: Basically, yesterday I upgraded from 17.10 to 18.04 Bionic Beaver. At the reboot, when I boot onto Ubuntu, after the GRUB has been shown, it just boots to nothing, my screen display "No signal detected", although I can hear the drum sound. Using nomodeset works but my computer is set at a wrong frequency (stuck to 77Hz, even forcing via xrandr doesn't work). So using nomodeset I got into i3, downloaded mesa drivers and tried radeon too, and rebooted. Now still shows no signal, but I can get into a fluent 60Hz i3, if I go to recovery mode, then press normal boot. The problem also with that is that GNOME doesn't work, when I leave i3, log onto GNOME, it shows a blackscreen and just sends me back to the login menu. I've noticed this error appeared at boot: [drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting. Here's xrandr output: xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1920 x 1080, maximum 1920 x 1080 default connected 1920x1080+0+0 0mm x 0mm 1920x1080 0.00* 1280x1024 0.00 1024x768 0.00 800x600 0.00 640x480 0.00 Thanks for any future help! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1756324/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp