vga16fb: blank screen with Intel GM965/GL960 on HP 2510p notebook

When I start debian-installer on my HP 2510p notebook the screen
becomes blank when it tries to start the frame buffer.  I can reproduce
the same behaviour when I load the vga16fb module manually.  I tested
at least 2.6.22 and 2.6.25-rc6.  It works though when I pass vga=773
to the kernel.

When I load the module, I get the following in dmesg and the screen goes
blank:

vga16fb: initializing
vga16fb: mapped to 0xffff8100000a0000
Console: switching to colour frame buffer device 80x30
fb0: VGA16 VGA frame buffer device

This notebook uses the following graphics chip:

00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)

Any idea what to do?


lspci -v
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Unknown device 30c9
        Flags: fast devsel, IRQ 16
        Memory at e0400000 (64-bit, non-prefetchable) [size=1M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 2000 [size=8]
        Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable-
        Capabilities: [d0] Power Management version 3

-- 
Martin Michlmayr
http://www.cyrius.com/

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