Description of problem: Cards using sis driver have awfully slow X. This is because vesafb and vga16fb drivers prevent sisfb from being loaded, hence the X driver has no access to better video memory management. Version-Release number of selected component (if applicable): Last reproduced in Fedora 8 How reproducible: Just install Fedora 5+ (iirc) in a video card that uses the sis driver and -probably- needs the sisfb memory interface. This can be fixed by blacklisting vesafb and vga16fb, and loading sisfb before X. I made a human readable summary in my blog: http://blogs.gnome.org/diegoe/2008/04/14/slow-x-rendering-with-sis-driver/ You can see more nasty details in the launchpad bug: https://launchpad.net/bugs/26637 As mentioned there, this can't be fixed in Fedora unless you rebuild your kernel because vesafb and vga16fb (honestly I don't recall which one) are/is not built as modules like in Debian based systems, it's built-in. The fix is just to make it a module and also build sisfb as a module. In the worst case, if this doesn't sound that important, then please build sisfb as a module (it's not loaded automatically ever, at least here on years using debian/ubuntu/others) and make vga16fb (i think that's the one) a module too. One more thing, as mentioned in the blog and the bug if you check for the "benchmark" recorded by X on its log you'll see how having or not sisfb loaded makes a difference. That's all folks!
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Fedora 8 changed to end-of-life (EOL) status on 2009-01-07. Fedora 8 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.