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When lightdm starts after rebooting or switching on, I'm greeted with
the login which is mirrored on both of my displays and the primary
monitor resolution is reduced from widescreen to a 4:3 resolution. If I
replug the external monitor, the display is no longer mirrored and the
correct resolution is displayed on the primary monitor. I also get the
Ubuntu logo in the centre of the external display of which I assume is
the correct behaviour. This is on a Lenovo G570 notebook.
$ sudo lspci -vv
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA
controller])
Subsystem: Lenovo Device 3975
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 41
Region 0: Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at 3000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Address: fee0c00c Data: 4161
Capabilities: [d0] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [a4] PCI Advanced Features
AFCap: TP+ FLR+
AFCtrl: FLR-
AFStatus: TP-
Kernel driver in use: i915
Kernel modules: i915
$ lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04
$ apt-cache policy lightdm
lightdm:
Installed: 1.1.8-0ubuntu1
Candidate: 1.1.8-0ubuntu1
Version table:
*** 1.1.8-0ubuntu1 0
500 http://gb.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
** Affects: unity-greeter
Importance: Undecided
Status: New
** Affects: gnome-settings-daemon (Ubuntu)
Importance: High
Status: Confirmed
** Affects: gnome-settings-daemon (Ubuntu Precise)
Importance: High
Assignee: Robert Ancell (robert-ancell)
Status: Confirmed
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Multi monitor mirrored instead of using primary/selected monitor
https://bugs.launchpad.net/bugs/959592
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