Comment 6 for bug 314928

ok, the here proposed fix really helps, thank u so much, so what i did was this:
first checked for the region:
lspci -vvnn:

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 04)
        Subsystem: Uniwill Computer Corp Device [1584:9800]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at ffe80000 (32-bit, non-prefetchable) [size=512K]
        Region 1: I/O ports at ec00 [size=8]
        Region 2: Memory at d0000000 (32-bit, prefetchable) [size=256M]
        Region 3: Memory at ffe40000 (32-bit, non-prefetchable) [size=256K]
        Capabilities: <access denied>
        Kernel modules: intelfb

then enabled it:
sudo -s
echo "base=0xd0000000 size=0x10000000 type=write-combining" > /proc/mtrr