On Wed, 2007-07-18 at 16:45 +0300, Al Boldi wrote: > Antonino A. Daplas wrote: > > On Wed, 2007-07-18 at 13:42 +0300, Al Boldi wrote: > > > Geert Uytterhoeven wrote: > > > > On Wed, 18 Jul 2007, Sasa Ostrouska wrote: > > > > > > Is there any technical reason why vesafb shouldn't support non-BIOS > > > modes? > > > > vesafb can only use modes included by the vendor in the card's BIOS. The > > mode table contains standard modes defined by VESA, and perhaps > > vendor-defined custom modes. However, the mode ID of custom modes varies > > from card to card, so you have to 'probe' the BIOS first for the list of > > modes and their associated ID. X + the 'vesa' driver does that probe, > > and so does the lrmi tool vbetest. > > > > So, one cannot just set any mode, unless that mode is already defined in > > the BIOS mode table. In VBE 3.0, you might be able to choose an > > arbitrary vertical refresh rate, but that's the best mode tuning you can > > do with the video BIOS. > > Thanks for a great explanation! > > Looks like this chip supports VBE 3.0, but it only locks into 60Hz refresh. > Here is an excerpt; full log attached. > >
What you need to look at the X log is this particular part (this is the output of my card, and for the sake of brevity, I removed the descriptive sections): Mode: 100 (640x400) Mode: 101 (640x480) Mode: 102 (800x600) Mode: 103 (800x600) Mode: 104 (1024x768) Mode: 105 (1024x768) Mode: 106 (1280x1024) Mode: 107 (1280x1024) *Mode: 10e (320x200) Mode: 10f (320x200) *Mode: 111 (640x480) Mode: 112 (640x480) *Mode: 114 (800x600) Mode: 115 (800x600) *Mode: 117 (1024x768) Mode: 118 (1024x768) Mode: 11a (1280x1024) Mode: 11b (1280x1024) Mode: 130 (320x200) Mode: 131 (320x400) *Mode: 132 (320x400) Mode: 133 (320x400) Mode: 134 (320x240) *Mode: 135 (320x240) Mode: 136 (320x240) *Mode: 13d (640x400) Mode: 13e (640x400) Mode: 145 (1600x1200) Mode: 146 (1600x1200) Mode: 147 (1400x1050) Mode: 148 (1400x1050) Mode: 152 (2048x1536) The list of modes include standard VESA modes and custom modes such as 2048x1536. So, if I want to use this mode for vesafb, I will add vga=0x352 (0x152 + 0x200) to my boot line. Tony - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
