[Bug 322356] [NEW] xorg on intel freezes on startup when using a kernel with CONFIG_HIGHMEM64G

[nikos]

Public bug reported:

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.

packages: xserver-xorg-video-intel 2:2.6.1-1ubuntu1
kernel: 2.6.28-5-server

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

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xorg on intel freezes on startup when using a kernel with CONFIG_HIGHMEM64G
https://bugs.launchpad.net/bugs/322356
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