I've same problem too with my Dell Studio 15, Ati Radeon HD3450 graphics card.
I use the latest Ubuntu version, Jaunty in 64 bits.
I fixed the bug with the PPA too ! Thanks a lot to Ubuntu Community !
(sorry for my bad english ...)
"lspci -vvnn" command reports :
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Mobility Radeon
HD 3400 Series [1002:95c4]
Subsystem: Dell Device [1028:029f]
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, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 2296
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=256M]
Region 1: I/O ports at 2000 [size=256]
Region 2: Memory at fc000000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at fc020000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: fglrx_pci
Kernel modules: fglrx
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[ubuntu 9.04] slow unminimizing with ati card and desktop effects enabled
https://bugs.launchpad.net/bugs/351186
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