Hi Antonino :)

    NEW INFORMATION ABOUT THE PROBLEM

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

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

quoted

quoted

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    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).

    Until I discovered how to reproduce the bug, I had to reboot for
each test. But I discovered the real problem...

    The garbling doesn't happen, no matter the udelay, until I start X.
Once X is started, even with an udelay(100) (which for me makes the
display untolerably slow) the problem happens.

    This doesn't happen in latest 2.4.x, but I remember that some
characters "dissappeared" from the screen at some 2.4.x when X was
running. That was a known bug in the X driver of this card, so I'm not
sure if the last X.Org driver has this problem or not. Unfortunately, I
cannot test this directly, the most I can do is to test under Ubuntu,
which uses an older 2.6.x kernel.

    If this new discovery doesn't ring any bell for you, I'll make a
test under Ubuntu and after that I'll just wait until I can upgrade X
(which I cannot do now) to latest X.Org (I'm now using 7.0.22).

    Thanks for all your help. I'll keep you informed of any change I
notice, and (although I won't be very fast doing it...) you can count on
me to test any patch you want.

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
It's my PC and I'll cry if I want to... RAmen!

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