Addtionally from the upstream bug report:
"The bios is setting up the mtrrs wrong. The fix is to enable the MTRR
cleanup support (CONFIG_MTRR_SANITIZER) option in the kernel:
http://lists.opensuse.org/radeonhd/2009-05/msg00070.html";
And from the link:
"I enabled MTRR cleanup support (CONFIG_MTRR_SANITIZER), set MTRR cleanup
enable value (CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT) to 1 and set MTRR
cleanup spare reg num (CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT) to 0."
Examining the Karmic kernel config files, CONFIG_MTRR_SANITIZER is
enabled, but the other options don't have the the values mentioned
above:
ogasaw...@emiko:~/ubuntu-karmic/debian/config$ grep -rn "CONFIG_MTRR_SANITIZER"
*
config.common.ubuntu:2317:CONFIG_MTRR_SANITIZER=y
config.common.ubuntu:2318:CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
config.common.ubuntu:2319:CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
A description of the config options can be found in ubuntu-
karmic/arch/x86/Kconfig:
config MTRR_SANITIZER
def_bool y
prompt "MTRR cleanup support"
depends on MTRR
---help---
Convert MTRR layout from continuous to discrete, so X drivers can
add writeback entries.
Can be disabled with disable_mtrr_cleanup on the kernel command line.
The largest mtrr entry size for a continuous block can be set with
mtrr_chunk_size.
If unsure, say Y.
config MTRR_SANITIZER_ENABLE_DEFAULT
int "MTRR cleanup enable value (0-1)"
range 0 1
default "0"
depends on MTRR_SANITIZER
---help---
Enable mtrr cleanup default value
config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
int "MTRR cleanup spare reg num (0-7)"
range 0 7
default "1"
depends on MTRR_SANITIZER
---help---
mtrr cleanup spare entries default, it can be changed via
mtrr_spare_reg_nr=N on the kernel command line.
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Tags added: kconfig
--
[HD 3650] Startup failure "Idle timed out, resetting engine..."
https://bugs.launchpad.net/bugs/341681
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which is the registrant for xserver-xorg-driver-ati.
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