I'm seeing the same issue. What appears to be happening is that there
are multiple outputs with the same name, but with different properties.
After breaking in gsd_rr_config_match at the end of
gsd_rr_config_load_current:
(gdb) p c1->priv->outputs[9]->priv->name
$54 = 0x1b3b370 "DP-3"
(gdb) p c1->priv->outputs[3]->priv->name
$55 = 0x1b3b2f0 "DP-3"
(gdb) p c1->priv->outputs[9]->priv->product
$56 = 0
(gdb) p c1->priv->outputs[3]->priv->product
$57 = 41150
(gdb) p c1->priv->outputs[3]->priv->vendor
$58 = "DEL"
(gdb) p c1->priv->outputs[9]->priv->vendor
$59 = "\000\000\000"
(gdb) p c1->priv->outputs[9]->priv->serial
$60 = 0
(gdb) p c1->priv->outputs[3]->priv->serial
$61 = 808666700
I assume these duplicates come from XRRGetScreenResources, which means
it might be a driver issue.
Are you using the NVIDIA binary driver by any chance? (I am)
** Information type changed from Private to Public
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https://bugs.launchpad.net/bugs/1542699
Title:
unity-settings-daemon crashed with SIGABRT in g_assertion_message()
Status in unity-settings-daemon package in Ubuntu:
New
Bug description:
16.04 nightly 2016-02-05
ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: unity-settings-daemon 15.04.1+16.04.20160201-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
Date: Sat Feb 6 19:05:56 2016
ExecutablePath: /usr/lib/unity-settings-daemon/unity-settings-daemon
InstallationDate: Installed on 2016-02-06 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160205)
ProcCmdline: /usr/lib/unity-settings-daemon/unity-settings-daemon
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/false
Signal: 6
SourcePackage: unity-settings-daemon
StacktraceTop:
g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
gsd_rr_config_load_current () from
/usr/lib/x86_64-linux-gnu/libunity-settings-daemon.so.1
gsd_rr_config_new_current () from
/usr/lib/x86_64-linux-gnu/libunity-settings-daemon.so.1
gsd_rr_config_load_filename () from
/usr/lib/x86_64-linux-gnu/libunity-settings-daemon.so.1
Title: unity-settings-daemon crashed with SIGABRT in g_assertion_message()
UpgradeStatus: No upgrade log present (probably fresh install)
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