[Bug 322356] Re: [i965] xorg on intel freezes on startup when using a kernel with CONFIG_HIGHMEM64G and AccelMethod is set to UXA

[Geir Ove Myhr]

** 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

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[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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