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yes, not supported. at least with the current SiS Windows drivers and all known videobios versions. there are several ways out:1366x768 not supported ??
it only detects 1024x768 because the SiS Windows driver SETS IT TO 1024x768! the driver scans the modelines from the bios and programs the vga sequencer accordingly. if there's no modeline for 1366x768 it simply uses the one that's close enough. this surely is NOT the native resolution of the lcd (which results in ugly stretching and/or scrolling of the desktop).i wonder why my monitor can't keep resolution ( my monitor detect only 102x768 )
hmm, so VGA SiS CANT make 1366x768?
look, like i already wrote: the hardware itself can do virtually any resolution (limitied by available video ram and some sequencer restrictions (RAMDAC, etc) ofcourse). the problem is the Windows driver from SiS which just reads modelines from the VGA bios. to my knowledge there's no SiS vbios that supports 1366x768. so you can't use 1366x786 with the Windows driver from SiS. to my knowlegde there's no 3rd party driver for Windows.if you don't believe me: go and grab a recent linux live cd (distribution doesn't matter) which includes the linux SiS driver. go and set the desktop to 1366x768 and watch how the SiS hardware can generate proper native LCD resolutions (of virtually any size).