Comment 33 for bug 287475

for me, debian sid with SIS 661 i resolved the problem using the patch found above adding case SIS_661 to the list- still using sis driver and adding sisfb to /etc/modules

this patch is not applied in xserver-xorg-video-sis 1:0.10.2-1

for using dual head i just use this xorg.conf file :

Section "Device"
Identifier "SIS 661"
Driver "sis"
        BusID "PCI:1:00:0"
        Option "MergedFBAuto" "on"
        Option "UseSSE" "yes"
EndSection

======================== patch found ===============================
http://<email address hidden>/msg02767.html

 src/sis_driver.c | 2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/sis_driver.c b/src/sis_driver.c
index 994b02d..b19e7a9 100644
--- a/src/sis_driver.c
+++ b/src/sis_driver.c
@@ -4099,6 +4099,8 @@ SISPreInit(ScrnInfoPtr pScrn, int flags)
             case SIS_315H:
             case SIS_330:
             case SIS_340:
+ case SIS_650:
+ case SIS_760:
             case XGI_40: readpci = TRUE;
                              break;
             case XGI_20: readpci = TRUE;
--
1.6.3.3
==================================================================