Comment 35 for bug 36461

This is affecting me as well. Booting the breezy kernel 2.6.12-10-386 gets it working again.

My cards:
0000:01:00.0 VGA compatible controller: nVidia Corporation NV6 [Vanta/Vanta LT] (rev 15)
0000:02:09.0 VGA compatible controller: Silicon Integrated Systems [SiS] 300/305 PCI/AGP VGA Display Adapter (rev 90)

Pertinant parts of X log:
(II) Reloading /usr/lib/xorg/modules/libint10.so
Requesting insufficient memory window!: start: 0xf0000000 end: 0xf7ffffff size 0xfe010000
Requesting insufficient memory window!: start: 0xfe000000 end: 0xfe2fffff size 0xfe010000
Requesting insufficient memory window!: start: 0xf0000000 end: 0xf7ffffff size 0xfe010000
Requesting insufficient memory window!: start: 0xfe000000 end: 0xfe2fffff size 0xfe010000
Requesting insufficient memory window!: start: 0xf0000000 end: 0xf7ffffff size 0xfe010000
Requesting insufficient memory window!: start: 0xfe000000 end: 0xfe2fffff size 0xfe010000
(EE) SIS(0): Cannot read V_BIOS
(--) SIS(0): Relocated I/O registers at 0x1000
Requesting insufficient memory window!: start: 0xf0000000 end: 0xf7ffffff size 0xfe010000
Requesting insufficient memory window!: start: 0xfe000000 end: 0xfe2fffff size 0xfe010000
Requesting insufficient memory window!: start: 0xf0000000 end: 0xf7ffffff size 0xfe010000
Requesting insufficient memory window!: start: 0xfe000000 end: 0xfe2fffff size 0xfe010000
(WW) SIS(0): Could not find/read video BIOS
(EE) SIS(0): **************************************************
(EE) SIS(0): ERROR:
(EE) SIS(0): Virtual screen too big for memory; 937K needed, 508K available
(EE) SIS(0): END OF MESSAGE
(EE) SIS(0): **************************************************