Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: unity-control-center (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1304627
Title:
Can't enable third screen on Samsung NP700Z5C
Status in “unity-control-center” package in Ubuntu:
Confirmed
Bug description:
[Background]
I have a Samsung NP700Z5C laptop. This has two external display connectors:
one HDMI and one proprietary mini-VGA
The laptop has a 1600x900 display. I also have two 24" 1920x1080
monitors. One is plugged into the HDMI port (this works as expected).
The other is plugged, via an adapter (model AA-AV2N12B), into the
mini-VGA port. This does not work correctly.
I have experienced a number of issues:
[1.]
The system does not detect the mini-VGA display correctly.
It appears in the Screen Display dialog as 'Unknown Display', and is
disabled by default. If I have the system set up as described above,
then the other two monitors work correctly at their native
resolutions. Clicking the toggle to enable the second 24" monitor (the
'Unknown Display') produces the following error message:
>The selected configuration for displays could not be applied
>could not set the configuration for CRTC 65
And then the mini-VGA monitor is enabled - but at the wrong resolution
(1024x768). The other monitor is disabled automatically.
[2.]
With the system in the state at the end of [1.], I attempted to re-enable the
HDMI monitor - but received the following two error messages:
>Failed to apply configuration: %s
>GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gnome_2drr_2derror_2dquark.Code2:
could not set the configuration for CRTC 65
>The selected configuration for displays could not be applied
>could not set the configuration for CRTC 65
The mini-VGA monitor remained enabled (at the wrong resolution), while
the HDMI monitor was not re-enabled as expected. In order to re-enable
the HDMI monitor, I had to first disable the mini-VGA monitor.
[3.]
If the
>The selected configuration for displays could not be applied
>could not set the configuration for CRTC 65
message is not closed quickly enough, the following error message is
displayed:
>Failed to apply configuration: %s
>Timeout was reached
Apart from anything, there appears to be some kind of format string
issue here.
_________________________________________________________________
Notes:
* I tried to set the mini-VGA monitor resolution with xrandr --mode, but got
a similar error message.
* Triple-head doesn't really matter to me - though it should work - I just
want to use the dual monitors when they're plugged in. I can't do this, because
I can't find a way to set the resolution of the mini-VGA monitor correctly.
* This setup works fine under Windows 7 - though I did have to fiddle a bit
to set it up initially.
_________________________________________________________________
-- System info
Description: Ubuntu Trusty Tahr (development branch)
Release: 14.04
-- Package info
unity-control-center:
Installed: 14.04.3+14.04.20140328-0ubuntu1
Candidate: 14.04.3+14.04.20140407-0ubuntu1
Version table:
14.04.3+14.04.20140407-0ubuntu1 0
500 http://gb.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
*** 14.04.3+14.04.20140328-0ubuntu1 0
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-control-center 14.04.3+14.04.20140328-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Apr 8 20:32:33 2014
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/unity-control-center
InstallationDate: Installed on 2014-04-05 (2 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: unity-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_unity-control-center:
activity-log-manager 0.9.7-0ubuntu12
deja-dup 30.0-0ubuntu4
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