On 10/03/11 13:57, Michel Dänzer wrote:
Eterm - though I'm of the opinion that the terminal emulator isn't actually relevant.Well, if it uses core X11 fonts, then text is rendered in software, which could certainly explain at least some of the issues. If you're using a non-anti-aliased font in the terminal, does switching to an anti-aliased one improve terminal performance?
I've tried this again now with Xterm, using "xterm -fa 'Mono' -fs 8" as the launch command line, which uses an anti-aliased font. There doesn't appear to be any improvement.
The problem appears to be affecting any application that moves substantial amounts of graphics data around - so scrolling a large amount of text in a terminal window causes visible flicker. Equally, rapidly moving a window around the desktop causes very obvious lag as the X server struggles to keep up, with ghost images being left around for a short period afterwards.I'm afraid that's rather vague and doesn't ring any bells.
Sorry - best description I could come up with. It's vaguely reminiscent of moving from outline window moving to opaque window moving years ago, when graphics cards were more underpowered than they are these days...
Then I don't suppose Option "ColorTiling" "off" helps, as I don't think that could have been enabled with 2.6.32.
Aha. That appears to have cured it.So, it looks like that option is the cause of a significant performance drop, which affects the desktop feel quite a bit.
If there's anything more I can do to narrow this down further and help it towards something useful to developers, I'm happy to test.
Thanks, Mike