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If I click the logout button in gnome the "fading feature" will take forever and I can watch every individual pixel getting dark on my screen. I'll have to wait almost one minute until the logout confirmation pops up. This special effect makes no sense on an unaccelerated server (framebuffer in my case).
Can you give some more details of your X configuration? Is this using the 4.0.x or 3.3.6 server? What CPU? What resolution? What video card? It is hard for me to imagine taking the effect taking a minute to run even with no hardware acceleration at all.
I just checked it again under beta5: It takes precisely 47 seconds. XF 4.0.1 FB server (from 4.0) CPU=PII 300 VGA=791 (1024x768 @ 16bpp) Lynx SMI 910 chip
Here's a workaround - in /etc/X11/XF86Config-4, in the Driver section, add the line: Option "ShadowFB" "off" It turns out that the problem is a bad interaction between the frame-buffer shadow code and the way I do the iris effect.
Are we planning to make this automatic? Should this bug move to Xconfigurator?
Sorry - I've already worked around the problem a couple of weeks ago in gnome-core, by doing the logout animation in a different way but forgot to close the bug.