This is a bug report taken from https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/445056.

If you follow the reports from the link above at least three of the users are having the same problem. The problem is that their desktops freeze as soon as they log in.

This is their lspci output:


00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
        Subsystem: Foxconn International, Inc. Device 0d4b
        Flags: bus master, fast devsel, latency 0
        Capabilities: <access denied>
        Kernel driver in use: agpgart-intel
        Kernel modules: intel-agp

00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)
        Subsystem: Foxconn International, Inc. Device 0d4b
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at fea80000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at dc00 [size=8]
        Memory at d0000000 (32-bit, prefetchable) [size=256M]
        Memory at fea40000 (32-bit, non-prefetchable) [size=256K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915
------------------------------------------------------------------------
00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)
 Subsystem: Elitegroup Computer Systems Device 2624
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at fea80000 (32-bit, non-prefetchable) [size=512K]
 I/O ports at dc00 [size=8]
 Memory at d0000000 (32-bit, prefetchable) [size=256M]
 Memory at fea40000 (32-bit, non-prefetchable) [size=256K]
 Capabilities: <access denied>
 Kernel driver in use: i915
 Kernel modules: i915
-------------------------------------------------------------------------
00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
 Subsystem: Hewlett-Packard Company Device 2a60
 Flags: bus master, fast devsel, latency 0
 Capabilities: [e0] Vendor Specific Information <?>
 Kernel driver in use: agpgart-intel
 Kernel modules: intel-agp

00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)
 Subsystem: Hewlett-Packard Company Device 2a60
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at ffa80000 (32-bit, non-prefetchable) [size=512K]
 I/O ports at ec00 [size=8]
 Memory at d0000000 (32-bit, prefetchable) [size=256M]
 Memory at ffa40000 (32-bit, non-prefetchable) [size=256K]
 Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable-
 Capabilities: [d0] Power Management version 2
 Kernel driver in use: i915
 Kernel modules: i915
------------------------------------------------------------------------------
I on the other hand have NO FREEZING PROBLEMS AT ALL!

This is my lspci output:

00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
 Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Device 3140
 Flags: bus master, fast devsel, latency 0
 Capabilities: <access denied>
 Kernel driver in use: agpgart-intel
 Kernel modules: intel-agp

00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)
 Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Device 3140
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at fdf00000 (32-bit, non-prefetchable) [size=512K]
 I/O ports at ff00 [size=8]
 Memory at d0000000 (32-bit, prefetchable) [size=256M]
 Memory at fdf80000 (32-bit, non-prefetchable) [size=256K]
 Capabilities: <access denied>
 Kernel driver in use: i915
 Kernel modules: i915
--------------------------------------------------------------------------------

As far as i can tell the only difference is in the "Memory at" and "I/O ports at" portions of lspci. I don't have a clue about drivers or anything but I wonder if this might be of any relevance to the bug.