** Summary changed:

- xorg on intel freezes on startup when using a kernel with CONFIG_HIGHMEM64G
+ 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.
+ 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

-- 
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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