kernel-packages team mailing list archive

[Boris Reinhard <reinhard.boris@xxxxxxxxxxxxxx>]

Hi Walter,

yep not default for every kind of ppc system, only for those specific G4
ibook's with the radeon 9200 variant, tho eMacs with those would also
seems like a save bet-!? Sry I haven't yet gotten around to the FAQ/
Known Issues addition but I plan on spending some time on it tomorrow :)

For everyone else reading up on this I figured I should post our
conclusion so far here as well:

1. yaboot params don't seem to stick/ carry over from live-boot
initiated installations (intentionally?? for many mac users this would
probably be unexpected and result in what I'd like to describe as "wtf I
already had the correct params set why doesn't it work as expected" and
be cause for confusion as the needed workarounds to "make it work" would
not be actually used anymore while still assumed to be in use, so likely
cause for seemingly "not working out of the box

Question:

what can be done about that or is pointing to more detailed Information
on that and the actual params needed the only available course of action
or can those params be set default out of the box on affected system
configurations?

2. Radeon 9200/ RV 280 (M9+) chips on the PowerBook6,5 (ibook G4, 12'
inch, 1.2 GHz) and also likely similar ibook and eMac Radeon 9000 range
of chips for some reason won't work reliable on Radeon-KMS with AGP
transfer enabled, so those need "radeon.agpmode=-1" no idea if it's a
flaw in the way Apple implemented AGP on these ibooks or in combination
with an expectation of the driver on how AGP is supposed to be
implemented, or simply some bug, but it won't work at the moment and
causes the freeze issue:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1377878

3. using the older framebuffer params in any way on top of things causes
conflicts with KMS which even with "radeon.agpmode=-1" set would cause
UI/ GUI issues like incomplete loading or nonfuctional UI/ GUI, so we
additionally would need "video=ofonly" here and should not try to
additionally use any combination of eg. "radeonfb" (which quite a few
older workaround instructions might confusingly suggest and result in
the user having any variation of params but not only the above 2 he or
she would need to make it work)

4. with "video=ofonly radeon.agpmode=-1" those ibooks would boot and be
useable prefectly fine BUT there will be "sluggish" feeling 2D/ gui/
windows moving and no accel at all which would be the result of not
having Xorg properly configured/ detecting the chip and using the
appropriate driver out of the box which also would have to be initiated
manually at this point:

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/1058641

https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1366556

to fix from a booted Installation:

sudo service lightdm stop

sudo Xorg -configure
sudo mv xorg.conf.new /etc/X11/xorg.conf
sudo nano /etc/X11/xorg.conf

[Here some driver options could be set, eg. uncomment pageflip and set
it to "True", save any edits and after that reboot]

sudo shutdown -r now

---------------

Grüße
boris

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1377878

Title:
  PPC - GUI freezes except for mouse pointer

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  During the installation the computer freezes completely except for the
  mouse pointer.  And even that is stuck with whatever shape it happened
  to have at the time it froze.  The steps I have to cause the freeze
  are run Ubiquity to start the installation open a terminal, run
  Ubuntu-bug and let it launch Firefox.  It will freeze every time then.
  Even the consoles (ctrl-alt-f1 etc) are unavailable.  What kind of
  information can I collect and how?

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