This isn't specific to a particular graphics chipset. I see the
behavior on a laptop with an Intel GMA4500:
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
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 60f0 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
and also on a workstation with an nVidia Quadro FX 4800:
60:00.0 VGA compatible controller: nVidia Corporation GT200GL [Quadro FX 4800]
(rev a1) (prog-if 00 [VGA controller])
Subsystem: nVidia Corporation Device 0594
Physical Slot: 2
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at f2000000 (32-bit, non-prefetchable) [size=16M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at f0000000 (64-bit, non-prefetchable) [size=32M]
I/O ports at 2000 [size=128]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidia-current, nouveau, nvidiafb
On both of these systems, I am running in "Ubuntu Classic" mode.
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https://bugs.launchpad.net/bugs/778083
Title:
Switching workspaces does not always redraw everything necessary
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