Re: [9fans] bug in S3 ViRGE DX/GX driver (aux/vga and/or kernel side)

Re: [9fans] bug in S3 ViRGE DX/GX driver (aux/vga and/or kernel side)

[rsc]

What screen resolution are you trying?

It's also possible that either the memory timing
is screwed up or the memory can't actually
support the bandwidth you're asking.  If you run
at a lower refresh rate does that help?

Russ

Re: [9fans] bug in S3 ViRGE DX/GX driver (aux/vga and/or kernel side)

[Atanas Bachvaroff]

rsc@plan9.bell-labs.com wrote:
>
> What screen resolution are you trying?
640x480x24, 800x600x24, 1024x768x24 (as 32bit modes are only supported
on GX2)
>
> It's also possible that either the memory timing
> is screwed up or the memory can't actually
> support the bandwidth you're asking.  If you run
same card is working ok with X Windows. bandwidths are supperted (ramdac
is 170MHz), i have fast edo dram on it. i just cannot imagine where the
problem could be. yesterday i started comparison of
/sys/src/cmd/aux/vga/virge.c (resp. parts of the kernel) and source of
the S3 ViRGE driver in XF86_SVGA server and still haven't found
problem...
> at a lower refresh rate does that help?
>
> Russ
any ideas (at least starting point, i am unable to find any of S3 ViRGE
SDK manuals)?

Atanas

[9fans] bug in S3 ViRGE DX/GX driver (aux/vga and/or kernel side)

[Atanas Bachvaroff]

hello. i have problems with the video card while trying to run P9R4 in
any of the 24bit color modes. what happens is this - it initializes the
video mode, but pixels seem to be shifted left or right with something
like a byte or two (problems with the interpretation of linear video
memory in the frame buffer code?); also - the rightmost column of about
200 pixels is exact copy of the leftmost such column. mouse pointer is
moving ok everywhere, although clicking is somehow funky (e.g. if i want
to resize a terminal window i have to click about 100 pixels right from
the window frame). there are no problems with 8 and 16bit modes. any
suggestions?

my video BIOS is this one - 0xC0045="S3 86C375/86C385 Video BIOS.
Version 1.01.03", dated 12/13/96.