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want 16-bit framebuffer

asked 2012-05-05 13:45:48 -0500

experix gravatar image

My Toshiba Satellite A65 with Fedora 12 had a 16-bit framebuffer (using vga=791 on the kernel command line). With Fedora 16 I get 32-bit, and want to go back to 16-bit. Trying gfxpayload=1024x768x16 on the kernel command line while booting, or putting set gfxmode=1024x768x16 at the top of /boot/grub2/grub.cfg, had no effect. How can I get this?

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answered 2012-07-19 10:05:59 -0500

TomasM gravatar image

If you can use (or are already using) radeon, intel or nouveau KMS, I recommend using their fb drivers and setting res and bpp with the video boot parameter.

From http://nouveau.freedesktop.org/wiki/KernelModeSetting, the syntax is something like video=<conn>:<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]

Try appending video=1024x768-16 as a kernel boot param and see if that works.

(With graphics questions, it's sometimes more helpful to mention your graphics card type instead of just a laptop model.)

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Asked: 2012-05-05 13:45:48 -0500

Seen: 442 times

Last updated: Jul 19 '12