issues with external CRT/dual USB ibook

[Stefan Werner <stewer@mac.com>]

Hi,

I just tried using an external CRT on my 600MHz dual USB iBook, 
using the latest benh kernel, aty128fb and m3mirror. I made 
following observations:

When I boot the iBook with the screen connected, turn the LCD off 
and switch then to modes other than 1024x768-xx, it seems to update 
only the RAMDAC but not the frequency. The OSD of my screen says the 
signal is still 75 Hz and the picture is scrambled but stable. When 
I tell it to switch to 1024x768-100, the picture is OK but at 75 Hz.

When I boot the iBook without the screen attached, do a 'm3mirror 
lcd:0 crt:1' and then connect the monitor, the screen shows the 
correct modes (I tried up to 1280x1024) with the correct frequencies 
but with a vertical wobble, like there were interferences.

Should I send that to benh? Is there a bug database for PPC kernels 
I can submit that to? I'd like to make sure that the ones who can 
fix that get informed about that bug.

Regards,
  Stefan