Created attachment 20349 [details]
This file have xorg.conf, Xorg.0.log and lspci

I have a laptop acer 557, when i start all is ok, but when i logout the x-server crash with this message;

(EE) SIS(0): Unable to map IO aperture. Invalid argument (22)
(EE) SIS(0): **************************************************
(EE) SIS(0):                       ERROR:
(EE) SIS(0): Could not map MMIO area
(EE) SIS(0):                   END OF MESSAGE
(EE) SIS(0): **************************************************
(EE) SIS(0): **************************************************
(EE) SIS(0):                       ERROR:
(EE) SIS(0): SiSMapMem() failed
(EE) SIS(0):                   END OF MESSAGE
(EE) SIS(0): **************************************************

Fatal server error:
AddScreen/ScreenInit failed for driver 0


My son have a acer 3000 with sis chipset and the same problem (The distribuition is the same).

distribution: kubuntu 8.10
kernel: 2.6.27-8-generic
xorg: 7.4
xserver-xorg-video-sis: 1:0.10.0-1build2
kde: 4.1.3

PS: Excuse my poor english, i only spead brazilian portuguese!