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Re: radeon 9000 PowerMac G4



I have had KMS working on my PowerBook and iBook G4 machines. This is the first time those kernel boot options have not worked. 

Sent from my iPhone

> On May 20, 2015, at 2:55 AM, Rick Thomas <rbthomas@pobox.com> wrote:
> 
> 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 <herminio.hernandezjr@gmail.com> 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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