Screen doesn't update properly (X says "timeout")

[Mourad De Clerck <mourad@aquazul.com>]

Hi,

I seem to run into a snag with one of my machines here:
Often, when my UI is drawing, it doesn't completely draw it. I'm using 
Gnome2, but observed this behaviour with GTK1.2  and 2 apps. For 
instance, the Gnome Foot menu doesn't show all the entries immediately 
(only the first 4 or so), and only draws them when I go over them. Other 
times, for instance when I'm browsing using Dillo, it only draws every 
odd line.

X output says:

CRTclk
FPclk
timeout
timeout
<snip>
timeout
timeout
timeout

waiting for X server to shut down ..

The hardware is quite slow, because it's a Toshiba chipset that doesn't 
have UDMA ide IO support. Graphics Card is a
Chips and Technologies F65554 (rev c2), processor a P166MMX, memory 
64MB. HD is a IBM in MDMA2 mode.

When X is running with Gnome2, there's about  23MB used according to 
memstat.

I have the impression that the timeouts seem to happen most often when 
trying to do several things at the time or when there's disk activity.
Any tips?

Thanks,

-- Mourad