Public bug reported:
Just at random the computer will either:
1) Loose the correct resolution: the monitor will read "out of sync" and I'll
have to cycle through the resolutions with ctrl+alt+<+>
2) Garbled blocky colors: the screen will display a weird blocky color pattern,
and usually the keyboard doesn't respond, and the system is totally locked up.
3) Abruptly lockup: randomly the computer will lockup and the keyboard will be
unresponsive, but the screen looks ok, and the mouse will still move.
This is a very serious error because the computer is almost completely
useless because at random it will lockup and I'll have to do a hard-
reboot.
I suspect it is with the Xorg drivers for the ATI card. Or with the DRI
or GLX. I've shhd into the computer while it was missbehaving and I
noticed that Xorg was taking 98%+ of cpu time.
I have a ATI Radeon 9250 PCI (256MB video ram), and I'm using the open-
source "ati" drivers. Direct rendering is working. I'm also using
Kubuntu 7.04 and have currently updated. The CPU is a AMD Athlon 1800+
with 256MB of main ram.
dmesg reports nothing strange.
glxinfo reports that:
libGL warning: 3D driver claims to not support visual 0x4b
Xorg.0.log reports a cycle like this (but only when it randomly goes out of
sync):
(**) RADEON(0): RADEONSaveScreen(2)
(**) RADEON(0): EngineRestore (32/32)
(**) RADEON(0): RADEONSwitchMode() !n(**) RADEON(0): RADEONModeInit()
720x400 35.50 720 756 828 936 400 401 404 446 (24,32) -H +V
720x400 35.50 720 756 828 936 400 401 404 446 (24,32) -H +V
(**) RADEON(0): Pitch = 8388736 bytes (virtualX = 1024, displayWidth = 1024)
(**) RADEON(0): dc=3550, of=28400, fd=126, pd=8
(**) RADEON(0): RADEONInit returns 0x81f5060
(**) RADEON(0): RADEONRestoreMode()
(**) RADEON(0): RADEONRestoreMode(0x81f5060)
(**) RADEON(0): RADEONRestoreMemMapRegisters() :
(**) RADEON(0): MC_FB_LOCATION : 0xdfffd000
(**) RADEON(0): MC_AGP_LOCATION : 0xffffffc0
(**) RADEON(0): Updating display base addresses...
(**) RADEON(0): Memory map updated.
(**) RADEON(0): Programming CRTC1, offset: 0x00000000
(**) RADEON(0): Wrote: 0x0000000c 0x0003007e 0x00000000 (0x0000a700)
(**) RADEON(0): Wrote: rd=12, fd=126, pd=3
(**) RADEON(0): GRPH_BUFFER_CNTL from 20077c7c to 20055c5c
(**) RADEON(0): EngineRestore (32/32)
cat /proc/mtrr:
reg00: base=0x00000000 ( 0MB), size= 256MB: write-back, count=1
reg01: base=0x0f800000 ( 248MB), size= 8MB: uncachable, count=1
reg02: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=2
reg05: base=0xe4000000 (3648MB), size= 8MB: write-combining, count=1
ProblemType: Bug
Architecture: i386
Date: Mon Mar 19 17:26:20 2007
DistroRelease: Ubuntu 7.04
Uname: Linux pc-amd-1800 2.6.20-12-generic #2 SMP Sun Mar 18 03:07:14 UTC 2007
i686 GNU/Linux
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
--
xserver bug: random lockups, blank/garbled screen, resolution changes
https://launchpad.net/bugs/93925
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