Re: Poor 2D performance with 8600gt
first of all, please don't pack the logs.
second. This looks not nice:
16: 35583 35425 35535 35443 IO-APIC-fasteoi uhci_hcd:usb1, uhci_hcd:usb6, ahci, nvidia
great, the driver shares its interrupt with almost everybody else. A different kernel might help
third, try enabling backingstore.
fourth, you are using a 32bit kernel. This slows down memory acess A LOT if you have more than 1gb of ram.
Try a 64bit system.
fifth, gtk is slow.
sixth, nvidia-settings -a InitialPixmapPlacement=2 -a GlyphCache=1