Suse 8.0 and i740

Hi. I have installed suse 8.0 , upgrade the xcdroast think and all (mp3,ogg,... ) , and now everything it's ok but my Xfree resolution. I have a 17" Sony monitor and a i740 c(8Mb) and and i only can get 1024 but i had 1152 with suse 7.2. Yast install the rigth Sony monitor and card but high resolution doesn't works properly. With 1280 the image flicker Thanks. bye.