Re: XFBdev resolution platinum 7200/90
On 6 Sep, this message from cesagbo@b2b2c.ca echoed through cyberspace:
> I`m using a 7200/90 with a platinum video adaptor 1mb.
> Debian woody is used with a 2.2.20-pmac kernel and 4.x.x Xserver
> The platinum framebuffer work very fine in 800x600.
>
> I haven`t been able to use a resolution of 800x600 with X. The xf86config-4 as been properly configured but the server fall back to the original platinum framebuffer résolution 640x480 16 bits. A line say "can`t use mode vt7" before the Xserver goes on in 640x480.
(Please set your mailer to do linebreaks at a sensible line length.
Thanks.)
Can you show us your /var/log/XFree86.0.log?
> I`ve tried to change the résolution while booting but it seem i don`t know how to do it.
> at bootX ---> video=platinum:vmode:800x600-60
I don't think this is the right option... for 800x600, I'd suggest:
video=platinum:vmode:12,cmode:0
which, according to /usr/src/linux/include/video/macmodes.h, is 800x600,
75Hz, with 8 bit/pixel. Other possible modes, with your amount of video
ram, would be:
vmode:12,cmode:1 (800x600, 75Hz, 16 bpp)
vmode:13,cmode:0 (832x624, 75Hz, 8 bpp)
vmode:13,cmode:1 (832x624, 75Hz, 16 bpp)
vmode:17,cmode:0 (1024x768, 75Hz, 8 bpp)
vmode:18,cmode:0 (1152x870, 75Hz, 8 bpp)
Check whether your monitor supports those.
Note that all of this is only for console; X may or may not use that
mode, depending on it's configuration.
> The XFBdev doc. are not very spécific about the platinum.
> The kernel doc. is very general too.
>
> Can i use a pc ati mach64 in a powermac? I gess not, because of the pci bus speed diff. (33/45Mhz) and the bios of the card...
PCI buses on Macs _always_ run at 33 MHz (or 666 MHz.. but that was
oneor two generations later :-) . Your 45 MHz is the CPU bus.
Making a Mach64 work in a 7200 can be done. Shouldn't be too hard....
Cheers
Michel
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