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[Launchpad Bug Tracker <373968@xxxxxxxxxxxxxxxxxx>]

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I have been getting glyph corruption since upgrading to Jaunty (examples
attached). Mostly it is a few characters here and there, but in some
cases the corruption is substantial. The corruption seems to be the
random flipping or changing of pixels across the glyph, sometimes in the
form of lines or blocks of pixels. The corruption is identical when a
particular character appears multiple times on the screen, and is
evident in screenshots.

The corruption -seems- to be more frequent when extra hardware
acceleration is being used. I set my desktop to use compiz and maximum
desktop effects, and saw quite a lot of this. After changing back to
metacity I believe I have been seeing it less frequently.

Another issue I am having is, I think, related. Since the upgrade I
occasionally get an X lockup of some description. Keyboard keys become
unresponsive (eg num lock does not change the associated light). The
machine itself is still operating, but very slowly as if under high
load. I am able to ssh in from a nearby machine, and top will indicate
that X is very busy. Firefox also tends to be quite busy, along with
chipcard4 for some reason. I am able to reboot from this point, although
it takes a long time. I am able to kill X, but again I have to wait. I
suspect it is doing some sort of long system call at the time, but was
not able to attach strace to see what it might be. To add more
confusion, I seem sometimes to be able to kill firefox, then press
Ctrl+Alt+F1 to return to normal operations.

My card details as per lspci:

04:01.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 SE] (rev 01)
	Subsystem: PC Partner Limited Device 7c25
	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 d0000000 (32-bit, prefetchable) [size=128M]
	Region 1: I/O ports at e000 [size=256]
	Region 2: Memory at fea00000 (32-bit, non-prefetchable) [size=64K]
	Expansion ROM at fea20000 [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-
	Kernel modules: radeonfb

04:01.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 SE] (Secondary) (rev 01)
	Subsystem: PC Partner Limited Device 7c24
	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
	Region 0: Memory at d8000000 (32-bit, prefetchable) [size=128M]
	Region 1: Memory at febf0000 (32-bit, non-prefetchable) [size=64K]
	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-

** Affects: xserver-xorg-video-radeonhd (Ubuntu)
     Importance: Undecided
         Status: New

-- 
glyph corruption and occasional X lockup in Jaunty with ati rv280 (radeon 9200 se)
https://bugs.launchpad.net/bugs/373968
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