I believe that I suffered from this same bug (I suffered from a bug with
the same symptoms, anyway--though I didn't try XAA as the original
poster did). Like the rest of you, the problem disappeared when I
upgraded to a 2.6.29 kernel; for me, it was 2.6.29-020629-generic. (I
didn't try any others.)
Here's my video card info., for those interested:
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS480 [Radeon
Xpress 200G Series] [1002:5954]
Subsystem: Hewlett-Packard Company Device [103c:2a24]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (2000ns min), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 17
Region 0: Memory at d8000000 (32-bit, prefetchable) [size=128M]
Region 1: I/O ports at ef00 [size=256]
Region 2: Memory at fddf0000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at fdd00000 [disabled] [size=128K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
--
[RV250] Kubuntu: X Freezes with Radeon driver EXA/XAA Composite
https://bugs.launchpad.net/bugs/348332
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