This bug is not a duplicate of https://bugs.launchpad.net/ubuntu/+source
/gnome-settings-daemon/+bug/924612 as per Sebastian at that bug.
Please could this be investigated further as this has been occurring
since 12.04 started development.
These are the errors that pop up when the setup breaks:
==> /var/log/kern.log <==
Mar 26 15:00:11 hostname kernel: [16224.830078] warning: `VirtualBox' uses
32-bit capabilities (legacy support in use)
Mar 26 15:00:17 hostname kernel: [16230.185470] [drm] nouveau 0000:02:00.0:
PMFB2_SUBP0: 0x037f0040
Mar 26 15:00:17 hostname kernel: [16230.185475] [drm] nouveau 0000:02:00.0:
PMFB2_SUBP1: 0x037f0040
==> /var/log/Xorg.0.log <==
[ 16238.183] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16238.183] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16238.183] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16238.401] (II) Quirked EDID physical size to 0x0 cm
[ 16238.742] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16238.742] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16238.742] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16238.961] (II) Quirked EDID physical size to 0x0 cm
[ 16240.549] resize called 1024 768
[ 16245.573] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16245.573] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16245.573] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16245.790] (II) Quirked EDID physical size to 0x0 cm
[ 16246.158] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16246.158] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16246.158] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16246.377] (II) Quirked EDID physical size to 0x0 cm
[ 16246.700] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16246.700] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16246.700] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16246.920] (II) Quirked EDID physical size to 0x0 cm
[ 16247.727] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16247.727] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16247.727] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16247.947] (II) Quirked EDID physical size to 0x0 cm
[ 16248.267] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16248.267] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16248.267] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16248.484] (II) Quirked EDID physical size to 0x0 cm
[ 16278.631] (II) NOUVEAU(0): EDID vendor "LGD", prod id 541
[ 16278.631] (II) NOUVEAU(0): Printing DDC gathered Modelines:
[ 16278.631] (II) NOUVEAU(0): Modeline "1600x900"x0.0 99.95 1600 1648 1696
1824 900 902 905 912 +hsync -vsync (54.8 kHz)
[ 16278.852] (II) Quirked EDID physical size to 0x0 cm
==> /var/log/kern.log <==
Mar 26 15:00:59 hostname kernel: [16272.896114] [drm] nouveau 0000:02:00.0:
PMFB1_SUBP0: 0x037f0000
Mar 26 15:00:59 hostname kernel: [16272.896120] [drm] nouveau 0000:02:00.0:
PMFB1_SUBP1: 0x037f0040
Mar 26 15:00:59 hostname kernel: [16272.896125] [drm] nouveau 0000:02:00.0:
PMFB2_SUBP0: 0x037f0000
Mar 26 15:00:59 hostname kernel: [16272.896131] [drm] nouveau 0000:02:00.0:
PMFB2_SUBP1: 0x037f0040
Mar 26 15:00:59 hostname kernel: [16272.896139] [drm] nouveau 0000:02:00.0:
PMFB1_SUBP0: 0x037f0040
Mar 26 15:00:59 hostname kernel: [16272.896144] [drm] nouveau 0000:02:00.0:
PMFB1_SUBP1: 0x037f0000
** This bug is no longer a duplicate of bug 924612
gnome-settings-daemon SIGABRT when gnome-session goes down
** Summary changed:
- Multimonitor setup breaks and reverts to mirror setup randomly and while
watching youtube videos
+ Multi-monitor setup breaks and reverts to mirror setup randomly
** Also affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: gnome-settings-daemon (Ubuntu)
** Summary changed:
- Multi-monitor setup breaks and reverts to mirror setup randomly
+ 12.04 - Multi-monitor setup breaks and reverts to mirror setup randomly
** Summary changed:
- 12.04 - Multi-monitor setup breaks and reverts to mirror setup randomly
+ 12.04 - Multi-monitor setup breaks and reverts to mirror setup randomly 3
times a day
** Summary changed:
- 12.04 - Multi-monitor setup breaks and reverts to mirror setup randomly 3
times a day
+ 12.04 - Multi-monitor setup breaks and reverts to mirror setup randomly
several times a day
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https://bugs.launchpad.net/bugs/921540
Title:
12.04 - Multi-monitor setup breaks and reverts to mirror setup
randomly several times a day
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