Additional screen if used at resolution > 1152x864 is mostly black

[Matthieu Patou]

After some period of time and most probably consequently after unity --replace (due to a non responsive unity/compiz) my additional screen in the dual screen setup is mostly black if I use it at a resolution > 1152x864.
Mostly means that the top bar of unity is ok but the rest is black and if I move a window from the main screen to the additional screen then the windows is not drawn.

I found out that removing $HOME/.gconfd/saved_state after having logout, will allow to "reset" the situation.

[Harry van Haaren (harryhaaren)]

What graphics drivers are you using? Also is it unity2d or 3d?

[Matthieu Patou (mat-matws)]

I think it's unity 3d as I don't have any unity 2D packets installed.

As for the driver it's intel: Driver for Intel Integrated Graphics Chipsets, lspci -v -v about my video card:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Device 30dd
        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 46
        Region 0: Memory at d8000000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 60f0 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

[Alberto Salvia Novella (es20490446e)]

Are you still experiencing this bug in any current supported Ubuntu release? (https://wiki.ubuntu.com/Releases)

If so please execute the following command in a terminal, as it will automatically gather debugging information:
apport-collect 794893

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]