Moved to amdgpu. The problem appears to be a conflict between amdgpu and
radeon, both of which were installed automatically on a fresh Xubuntu
18.04 install.
** Package changed: xorg (Ubuntu) => xserver-xorg-video-amdgpu (Ubuntu)
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Uninstalling the `radeon` drivers, but keeping the `amdgpu` drivers,
fixes the problem. Therefore, this is not an Xorg bug.
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https://bugs.launchpad.net/bugs/1780237
Title:
Screen
Ah. `radeon` and `amdgpu` are trying to load together, that may not be
helping:
george@ThinkPad-E465:~$ cat /var/log/Xorg.0.log.old | grep amdgpu
[29.119] loading driver: amdgpu
[29.119] (==) Matched amdgpu as autoconfigured driver 0
[29.119] (II) LoadModule: "amdgpu"
[
Hmm. `xrandr --listmonitors` gives two monitors connected:
george@ThinkPad-E465:~/Documents/bug$ xrandr --listmonitors
Monitors: 2
0: +*eDP 1366/309x768/173+0+0 eDP
1: +*eDP 1366/309x768/173+0+0 eDP
There is only one monitor on this laptop, the internal display.
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You received
Public bug reported:
On a ThinkPad E465 with dual AMD graphics (both integrated AMD Radeon R6
and dedicated Radeon R5 graphics) running Xubuntu 18.04 Bionic Beaver,
when opening the lid, lightdm asks for my password, after successfully
unlocking the device, the screen goes black with the
Yes, there was a cable plugged in to the other port, but the monitor on
the other end was set to a different input and I expected it to have
been ignored. The 'bug' is that during installation, there's no need to
set up multiple screens, except as clones of each other, so that the
Public bug reported:
The installation system comes up expecting 2 displays and the window
decorations are in the non visible screen as is the control panel for
performing the install. By bringing the cursor to the active screen (it
starts out far left off screen), I can start a terminal from the
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