Comment 115 for bug 182038

Using the proposed fix (switching to EXA) removed the black blocks for me, but makes rendering unbearably slow. So it's not really a solution. Using the radeon driver with a FireGL V3200. Output from lspci follows:

01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M24GL [Mobility FireGL V3200] [1002:3154] (rev 80) (prog-if 00 [VGA controller])
 Subsystem: IBM Unknown device [1014:0570]
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
 Latency: 0, Cache Line Size: 32 bytes
 Interrupt: pin A routed to IRQ 16
 Region 0: Memory at c0000000 (32-bit, prefetchable) [size=128M]
 Region 1: I/O ports at 3000 [size=256]
 Region 2: Memory at a8100000 (32-bit, non-prefetchable) [size=64K]
 [virtual] Expansion ROM at a8120000 [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-
 Capabilities: [58] Express Endpoint IRQ 0
  Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag+
  Device: Latency L0s <256ns, L1 <4us
  Device: AtnBtn- AtnInd- PwrInd-
  Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
  Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
  Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
  Link: Supported Speed 2.5Gb/s, Width x16, ASPM L0s L1, Port 0
  Link: Latency L0s <256ns, L1 <2us
  Link: ASPM L1 Enabled RCB 64 bytes CommClk+ ExtSynch-
  Link: Speed 2.5Gb/s, Width x16
 Capabilities: [80] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
  Address: 0000000000000000 Data: 0000