** Summary changed:
- xorg on intel freezes on startup when using a kernel with CONFIG_HIGHMEM64G
and AccelMethod is set to UXA
+ [i965] xorg on intel freezes on startup when using a kernel with
CONFIG_HIGHMEM64G and AccelMethod is set to UXA
** Description changed:
Binary package hint: xserver-xorg-video-intel
On Ubuntu Jaunty Alpha3 with all the latest updates(28.1.2009) the xorg
freezes when starting, only when the system is running a kernel with the option
CONFIG_HIGHMEM64G enabled.
This has been experienced on thinkpad x300 with 4GB of memory, with a
GM965/GL960 graphics controller.
I firstly experienced this problem when i tried the linux-server kernel. The
system boots fine, but when i start X then the graphics completely freeze. I am
able to reboot the machine with alt-ctrl-delete, although nothing is shown on
the screen until it resets.
The same system with the linux-generic kernel works fine.
I recompiled the kernel shipped with jaunty, using the linux-generic config
file and changing only the kernel support to be for 64GB of memory
CONFIG_HIGHMEM64G=y. The result was the exactly the same like using the
linux-server kernel. The graphics freeze but the computer can be rebooted.
UPDATE: After some further tests, the problem exist only when "Option
"AccelMethod" "UXA"" is used. With the AccelMethod set to EXA, the X server
works also with CONFIG_HIGHMEM64G kernels
packages: xserver-xorg-video-intel 2:2.6.1-1ubuntu1
kernel: 2.6.28-5-server
+
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory
Controller Hub [8086:2a00] (rev 0c)
+ Subsystem: Lenovo Device [17aa:20b3]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile
GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 0c)
+ Subsystem: Lenovo Device [17aa:20b5]
** Tags added: 965gm intel jaunty xorg
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete => Confirmed
--
[i965] xorg on intel freezes on startup when using a kernel with
CONFIG_HIGHMEM64G and AccelMethod is set to UXA
https://bugs.launchpad.net/bugs/322356
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