Re: tdfx framebuffer garbles display in 2.6.19.5

On Tue, 2007-03-06 at 07:25 +0100, DervishD wrote:

    Hi Antonino :)

 * Antonino A. Daplas [off-list ref] dixit:

quoted

On Thu, 2007-03-01 at 17:01 +0100, DervishD wrote:

quoted

 * Antonino A. Daplas [off-list ref] dixit:

quoted

Can you try this patch?  It might help with the screen
corruption.

    With the patch, the scroll slows to a crawl and the system is
    unusable. The time to scroll 30 lines is about a minute or so
    (probably more, I just measured for a while).

    If you want me to test other patches, just tell :)

Can you change the mdelay to udelay and use higher/lower delay values
to see if there's any improvement?

    Yes, as soon as I can build a new kernel and reboot. Any suggested
value?

You can start with 5 and increment by 5.  So you need not reboot each
time, compile tdfxfb as a module, and set CONFIG_HW_CONSOLE_BINDING=y
(under drivers->char). Make sure you have vbetool, and use the attached
script.  Thus:

modprobe tdfxfb
unbind.sh
rmmod tdfxfb
edit, make, make modules_install
modprobe tdfxfb
repeat

The script assumes vbetool is in /usr/sbin, if not just edit. Also,
unbinding will only work if X (or any graphics app, for that matter) is
not loaded.

Tony