Public bug reported:
After waking up, first display (built in of Thinkpad L412) appears black
and message box "Could not set the monitor configuration: could not set
the configuration for CRTC 79" appeared (visible on second monitor).
$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
VGA-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y
axis) 531mm x 298mm
1920x1080 60.0*+
1680x1050 60.0
1600x900 60.0
1280x1024 75.0 60.0
1280x800 59.8
1152x864 75.0
1280x720 60.0
1024x768 75.1 60.0
832x624 74.6
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
LVDS connected (normal left inverted right x axis y axis)
1366x768 60.0 + 50.0
1280x720 59.9
1152x768 59.8
1024x768 59.9
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
$ sudo lshw -c video
*-display
description: VGA compatible controller
product: RV710/M92 [Mobility Radeon HD 4530/4570/545v]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:43 memory:d0000000-dfffffff ioport:2000(size=256)
memory:cfef0000-cfefffff memory:cfe00000-cfe1ffff
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-settings-daemon 14.04.0+14.04.20140414-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Apr 29 11:22:20 2014
ExecutablePath: /usr/lib/unity-settings-daemon/unity-settings-daemon
InstallationDate: Installed on 2013-10-23 (187 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: unity-settings-daemon
UpgradeStatus: Upgraded to trusty on 2014-04-18 (10 days ago)
** Affects: unity-settings-daemon (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug third-party-packages trusty
** Attachment added: "Screenshot from 2014-04-29 11:22:08.png"
https://bugs.launchpad.net/bugs/1314059/+attachment/4100152/+files/Screenshot%20from%202014-04-29%2011%3A22%3A08.png
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https://bugs.launchpad.net/bugs/1314059
Title:
Laptop builtin display is black after wakeup, "could not set the
configuration for CRTC 79"
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