Hi Herminio,
I gather you’re hoping for video acceleration via KMS?
If not, you can use boot parameters
nomodeset vga=0x31B
This gives un-accelerated graphics, but at least it doesn’t freeze (on my
machine) or give scrambled colors. The default jessie amd64 install either
gives scrambled colors or freezes randomly. The vga=0x31b parameter sets the
video resolution, in this case it’s 1280x1024, 24-bits.
See
http://en.wikipedia.org/wiki/VESA_BIOS_Extensions#Linux_video_mode_numbers
for a chart of resolution options that may be used.
The web page also suggests the “hwinfo —framebuffer” command. You’ll need to
install the “hwinfo” package — it’s available in Debian, but it seems to only
work on x86/amd64 hardware. I tried it on a powerpc64 machine and it gave me
lots of error messages and no useful output.
For powerpc hardware, there’s the “fbset” command (also available as a separate
package in Debian).
I’ve seen hints that the “vga=“ boot-option may not be supported on
non-x86/amd64 hardware, but it’s certainly worth a try! And I can vouch from
personal experience that the “nomodeset” option is supported, and works, on
powerpc/powerc64.
My graphics card (on the amd64 machine) is
09:02.0 VGA compatible controller: NVIDIA Corporation NV44A [GeForce 6200]
(rev a1)
On the powerpc64 machine, it’s
0000:0b:00.0 VGA compatible controller: NVIDIA Corporation NV43 [GeForce
6600 LE] (rev a2)
Hope that helps!
Enjoy!
Rick
On May 19, 2015, at 11:11 PM, Herminio Hernandez Jr
<[email protected]> wrote:
> On a Powermac G4 when I use these parameters
> radeon.agpmode=-1
> radeon.modeset=1 radeon.agpmode=-1
> radeon.modeset=1 video=offb:off radeon.agpmode=-1
>
> KMS does not load fbdev does and my colors are all off. However if I do
> this
>
> radeon.modeset=1 video=offb:off video=radeonfb:off radeon.agpmode=-1
>
> then I get the right colors but the screen freezes. I am betting it is
> due to the really old card I have. I am planning replacing it with a
> better one, but I was wonder has anyone found a work around. Thanks!
>
>
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