Re: Screen corruption in 2.4.18

[Steven Walter]

On Tue, Mar 19, 2002 at 10:12:18PM +0100, Danijel Schiavuzzi wrote:
> Hi.
> 
> Some two weeks ago I posted here a kernel bug report regarding
> a screen corruption issue. You can find it here:
> http://www.uwsg.indiana.edu/hypermail/linux/kernel/0203.0/1577.html
> 
> As I didn't know if it's my hardware that is the cause of corruption,
> searched over the Internet and found that Thomas Brehm is also
> having the same problem, and he has the same motherboard as me
> (MSI MS-6340M, VIA KM133 chipset - VT8365 north + VIA686B south bridge).
> 
> Short problem description: 2.4.17 kernel works fine, but any kernel
> higher than this makes the screen corrupted in any text or VESA fb
> mode. In standard text mode, the screen gets filled with vertical
> lines. In vesafb mode, random horizontal lines appear on the screen.
> 
> However, I made up the 2.4.18 kernel to boot up properly by 
> replacing the file
> 
> 	./linux/arch/i386/pci-pc.c
> 
> with that from the 2.4.17 kernel. The kernel runs fine now.
> 
> So, what seems to make the screen corruption?

I also experienced this problem on a VIA board.  I tried removing my
chipset from the list of those which need the fix-up from pci-pc.c, and
this elimiated all the corruption.  It would seem that this chip, at
least on our specific boards, does not need the fix-up, and in fact it
is detrimental.
-- 
-Steven
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