I having the same error with a clean install and am foreced to use 'nomodeset' just to get to the desktop. Any attempt to install the proper AMD drivers just puts me right back to a blackscreen on bootup.
[drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting Current Graphics: llvmpipe (LLVM 6.0, 128 bits) Cannot play Arma 3 on steam or any games for that matter as Open GL is not enabled. -- 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
