Messages in this thread | | | Subject | Re: Radeon in LK 2.4.21pre7 | From | Benjamin Herrenschmidt <> | Date | 22 Jul 2003 14:55:14 +0200 |
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On Sun, 2003-07-20 at 07:43, Kristofer T. Karas wrote: > Ben, Ani, et al, > > Just tried Linux kernels 2.4.21pre6 and pre7 with my Radeon 8500LEE and > have had some dreadful corruption problems related to pixel clearing > during scroll and ypan. This is probably old news to you; so <aol>me > too</aol>. I first noticed this in the -ac kernels, but a variant is > now in mainline -pre. > > Problem #1: When scrolling, radeonfb fails to erase the portion of the > screen at the bottom, leaving all sorts of random pixels in the bottom > line. Further scrolling propagates these pixels upwards. > See http://enterprise.bidmc.harvard.edu/~ktk/temp/radeonfb/screen-1.jpg > (Sorry for camera-shake; hand-held in dim room...)
This looks like erase not working properly... This usually happens after switching back from X as X tends to leave some garbage in some engine registers, and is usually cured by switching to another console (this is why I tend to force-reinit the accel engine on console switch).
Since your problem seem to not depend on XFree, I suspect something else hairy is going on with the engine, I don't know what yet though, I'll try to find some clue.
In the meantime, can you send me a dmesg output ?
Thanks, Ben.
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