This bug still alive within Linux version 4.10.0-19-lowlatency (booting
UbuntuStudio 17.04 from USB stick).
$ egrep 'drm|radeon' /media/cyril/SanDiskBlanc/dmesg170430.log
[ 7.414065] [drm] Initialized
[ 7.451216] [drm] VGACON disable radeon kernel modesetting.
[ 7.451282] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon
module!
[ 17.166670] [drm] VGACON disable radeon kernel modesetting.
[ 17.166728] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon
module!
[ 29.316284] [drm] VGACON disable radeon kernel modesetting.
[ 29.316343] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon
module!
$
(see apport information just before this post).
Quite annoying because AMD proprietary driver unavailable for new
kernels.
Status moved from Expired to New.
** Changed in: xorg (Ubuntu)
Status: Expired => New
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https://bugs.launchpad.net/bugs/1576864
Title:
Unable to extend to second display
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