howto: uvesafb widescreen

1. You need to configure your kernel kernel. In the “Device Drivers” section select:

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    [*] Connector - unified userspace kernelspace linker
    Graphics support --->
        Support for frame buffer devices --->
            [*] Userspace VESA VGA graphics support
   

2. build the kernel: make

3. emerge klibc

4. emerge v86d

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    # emerge klibc
   

   Note: This step is necessary because klibc has to be compiled against a kernel tree that includes uvesafb. You only need to do this once, i.e. you won’t have to remerge klibc every time you install a new kernel or a new kernel module.

5. install v86d:

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    # emerge v86d
   

6. reconfigure your kernel; in the “General Setup” section select:

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    [*] Initial RAM filesystem and RAM disk (initramfs/initrd) support
   

   and use /usr/share/v86d/initramfs in Initramfs source file(s). (that’s CONFIG_INITRAMFS_SOURCE="/usr/share/v86d/initramfs)

7. rebuild the kernel: make, and install it

8. add video=uvesafb:1024x768-32,mtrr:3,ywrap (or similar) to your kernel command line

9. reboot and enjoy uvesafb :)

check /sys/bus/platform/drivers/uvesafb/uvesafb.0/vbe_modes for available video modes.

Source