On Wed, Nov 22, 2000 at 02:48:45PM +0000, jon ewing wrote:
>
> Hi,
>
> If I understand correctly, when I boot with
>
> append="video=aty128fb:vmode:20,cmode=32"
>
> in my yaboot.conf, the aty128fb driver will be communicating directly with
> my graphics hardware. When I then start X using the fbdev driver, the modes
> available to X are limited by the modes available to aty128fb. So, if I add
> a new mode to fb.modes and am able to successfully switch to that mode on
> the console using, eg, fbset --test, then I should also be able to run X in
> that mode.
>
> My fb.modes initially contained 3 "1600x1200-.." modes (.. = 60, 66 or 76),
> but if I try fbset-ing to any of these modes the screen goes blank. By
> default the console appears at 1280x1024-75.
>
> If instead I boot with novideo then my console appears in glorious
> 1600x1200. I then tried fbset, which returned
>
> mode "1600x1200-49"
> # D: 100.00 MHz, H: 60.976 kHz, V: 49.174 Hz
> geometry 1600 1200 1600 1200 8
> timings 10000 16 16 16 16 8 8
> endmode
The video mode information returned while using offb (novideo) is not
valid, as far as I know, so using this will not work.
> I added this to my fb.modes, changed my yaboot.conf back to aty128fb,
> rebooted, tried fbset --test "1600x1200-49", and again the screen went blank.
>
> Am I going about this the right way?
>
> Olaf - I tried those settings and each of them just blanked the screen. Are
> you booting with the aty128fb driver or with novideo (or something else)?
> Also, are you using the fbdev driver for X or the r128 driver? What
> parameters are you passing to the driver?
>
> Michel - How would I find the timings that I'd need in order to add a
> 1600x1280 mode to my fb.modes?
Try the mode lines from Olaf (which I haven't tried, but let's assume
they're right), and make sure you do NOT have UseFBDev in your
/etc/X11/XF86Config file. This sounds like it might be a bug in the
aty128fb driver.
ttyl,
--
Josh Huber | huber@debian.org |
| Debian Developer |
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