Re: OldWorld ROM Macintoshes

Hi Cedar,

On 9/10/25 9:49 AM, Cedar Maxwell wrote:
> On Mon, 2025-09-08 at 21:15 -0600, Stan Johnson wrote:
>> ...
>>>>
>>>> My BootX configuration is as follows (working X11 in 6.1.0 in
>>>> Gentoo):
>>>>        Kernel: vmlinux-6.1.0-pmac (custom kernel, no modules)
>>>>        Boot Device: /dev/sda13 (Gentoo partition)
>>>>        More kernel arguments:
>>>> video=atyfb:vmode:14,cmode:32,mclk:71
>>>>        No video driver: checked
>>>>        Options:
>>>>          Force SCSI ON: checked
>>>>          Force video settings: checked
>>>>          Use specified RAM disk: not checked
>>>
>>> ...
> 
> In your Xorg.log it should say which "video=" option you are using.
> ...

On a Wallstreet running kernel 6.1 in Gentoo and using twm:

$ fgrep video xorg.0.log
[    70.783] Kernel command line: root=/dev/sda13 
video=atyfb:vmode:14,cmode:32,mclk:71 video=ofonly
[    72.023] (II) FBDEV(0): hardware: OFfb ATY,RageLT (video memory: 3072kB)

$ cat /proc/cmdline
root=/dev/sda13 video=atyfb:vmode:14,cmode:32,mclk:71 video=ofonly

Like you noticed, it appears that "video=ofonly" is also being passed 
since I checked "No video driver".

See Xorg.0.log_no_video_driver_checked.xz, attached. X11 works.

If I uncheck "No video driver", video=ofonly is no longer being passed 
to the kernel, and X11 does not work (text login prompt only):

$ fgrep video Xorg.0.log
[    66.565] Kernel command line: root=/dev/sda13 
video=atyfb:vmode:14,cmode:32,mclk:71

$ cat /proc/cmdline
root=/dev/sda13 video=atyfb:vmode:14,cmode:32,mclk:71

See Xorg.0.log_no_video_driver_unchecked.xz, attached. X11 doesn't work.

I think the atyfb driver is the same as Mach64; I see this in Xorg.0.log 
when video=ofonly isn't passed to the kernel:

$ grep -i Mach64 Xorg.0.log
[    67.315] (II) LoadModule: "mach64"
[    67.323] (WW) Warning, couldn't open module mach64
[    67.323] (EE) Failed to load module "mach64" (module does not exist, 0)

So we may need to investigate why xorg module mach64 doesn't exist in 
/usr/lib/xorg/modules/drivers.


 > ...