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Bug#347186: linux-image-2.6.14-2-alpha-generic: garbled Matrox framebuffer

On Mon, Jan 09, 2006 at 01:08:49AM -0800, Steve Langasek wrote:
> Package: linux-2.6
> Version: 2.6.14-7
> Severity: important
> Sigh, can't get a break with alpha kernel support around here.  After
> upgrading to 2.6.14 (from 2.4.27), the Matrox framebuffer no longer works
> correctly on my alpha with a Matrox Millenium II.  The matroxfb_base module
> loads without error, but gives me corrupt video output only.

Try turning off acceleration.

matroxfb is problematic, since the matroxfb maintainer didn't agree on the
2.4->2.6 fbdev API change, and thus things broke all over, and has a huge
patch that reverses the new fbdev stuff. At least this was the case a 
year or two back at least.

> Card info from lspci:
> 0000:00:05.0 VGA compatible controller: Matrox Graphics, Inc. MGA 2164W [Millennium II]
> and lspci -n:
> 0000:00:05.0 0300: 102b:051b
> dmesg output:
> matroxfb: Matrox Millennium II (PCI) detected
> PInS memtype = 0
> matroxfb: 640x480x8bpp (virtual: 640x6553)
> matroxfb: framebuffer at 0x9000000, mapped to 0xfffffc8809000000, size 4194304
> fb0: MATROX frame buffer device
> fb0: initializing hardware
> Happy to test potential driver fixes, though due to issues with *other*
> hardware in this system I didn't test the framebuffer with any previous 2.6
> kernels and can't tell you whether it worked with them.

It probably was always so, and matroxfb is problematic.


Sven Luther

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