[gm45] maverick screen does not update except when mouse moves or key is held down

[Workaround]
Use a 2.6.36 kernel. e.g.: http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.36-maverick/

Binary package hint: xorg

The screen does update very reluctantly unless I move the mouse. This can be seen very well e.g. in sytem monitor resources. The graphs move smoothly as long as I wiggle the mouse, if I stop the graphs only update in fits and bounds. This does not happen always, but the system has gotten into this state rather regularly for as long as I have been trying maverick afair. The system also leaves this buggy state by itself. Often within a couple of minutes. CPU and IO load are normal at all times.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-20.29-generic 2.6.35.4
Uname: Linux 2.6.35-20-generic x86_64
Architecture: amd64
DRM.card0.DisplayPort.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x800
 edid-base64: AP///////wAGr3SAAAAAAAEQAQOAIRV4Chz1l1hQjicnUFQAAAABAQEBAQEBAQEBAQEBAQEBxxsAoFAgFzAwIDYAS88QAAAYAAAADwAAAAAAAAAAAAAAAAAgAAAA/gBBVU8KICAgICAgICAgAAAA/gBCMTU0RVcwOCBWMCAKAEU=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Wed Sep 8 20:22:33 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100822)
MachineType: Acer Extensa 5630
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-20-generic root=UUID=c58e97ab-7a80-4b62-8270-2d2af7e84e1d ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 12/05/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.25
dmi.board.name: Homa
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.25:bd12/05/2008:svnAcer:pnExtensa5630:pvr0100:rvnAcer:rnHoma:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Extensa 5630
dmi.product.version: 0100
dmi.sys.vendor: Acer
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: maverick
 architecture: x86_64
 kernel: 2.6.35-20-generic

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] Device [1025:013c]