[ubuntu-x] Ubuntu-x Digest, Vol 36, Issue 10

[Steven]

Taylor,

No one's "in charge of" the wiki; that's why it's a wiki. If people find
ways to improve it, they can do so. I think your uninstalling instructions
are a great thing to add to the wiki. Just hit the "Edit" button on the top
left and copy'n'paste :)


Jerry (re: i915.modeset),

The legacy driver is xserver-xorg-video-intel 2.12 with the addition of the
UMS code from before Karmic (so no GEM memory management, which might be
causing the problems). This UMS code is what needs testing, since the X team
is thinking about canning KMS for i8xx cards.

Now, in Lucid, KMS has been blacklisted for i8xx cards since the 2.6.32-21
kernel. So if the only change you've made is to add this aubergine PPA, then
your system will boot into that UMS code. But if you've enabled any
workarounds to re-enable KMS (UMS was sending a bunch of people into black
screens in Lucid), or are running Maverick (which has *not* blacklisted KMS
on i8xx cards), then you'll need to boot with i915.modeset=0 (or nomodeset)
to get into that UMS code.

So if setting i915.modeset=0 does anything funky, that's a good thing to let
us all know about, because that's the change that's supposed to fix
everything (at least with this legacy driver). Testing i915.modeset=1 (the
'1' means KMS, the '0' means UMS) doesn't help at all, because that just
boots into KMS which everyone already knows is causing problems, especially
with XVideo.

I hope that helps clear things up. So the wiki instructions aren't "wrong",
it's just that the legacy driver doesn't work for you. Those are two very
different things.

-Stenten


On Wed, Aug 11, 2010 at 2:42 PM, Taylor Brown <taylor at nearlyalaugh.com>wrote:

> Thanks for the suggestion, Jerry.
>
> I wanted to further report that the driver doesn't work on my system
> whether I use i915.modeset=0, =1, or whether I omit the option entirely.
> At least my system only crashes after resuming from suspend...
>
> I don't know who's in charge of the wiki page, but for those users who
> find themselves with a broken X server it might be helpful to add a
> quick note about /uninstalling/ the legacy driver:
>
> 1. Login as root in recovery mode,
> 2. Find and remove the ppa entry in /etc/apt/sources.list.d/,
>        # cd /etc/apt/sources.list.d/
>        # rm raof[something]
> 3. Find the newly created-added apt key and delete it and update,
>        # apt-key list
>        # apt-key del [whatever]
>        # aptitude update       (or apt-get update)
> 5. Downgrade xserver-xorg-video-intel,
>        # aptitude remove xserver-xorg-video-intel      (or apt-get remove)
>        (choosing the option to downgrade to the earlier version)
> 6. Remove the modesetting line from GRUB if it's been added,
>        # nano /etc/default/grub
>        # update-grub
> 7. Exit recovery mode, login as user, and start X,
>        # exit
>        (log in as user)
>        $ sudo gdm
>
>
> Hope this feedback helps someone,
>
> Taylor
>
> Ubuntu 10.04.1 LTS
> Linux 2.6.32-24-generic
> Intel Corporation 82915G/GV/910GL Integrated Graphics Controller (rev 04)
>
> On 08/11/2010 06:21 AM, jerrylamos at aim.com wrote:
> >   Taylor,
> >
> > Many of us found the wiki instructions don't work. However the driver
> does.
> >
> > Putting i915.modeset=0 or =1 or nomodeset in the linux line as in the
> > wiki instructions does NOT work. Fails every time.
> >
> > What works for me is "quiet" for options in the linux line, and from
> > posted comments for others as well.
> >
> > I've got an i845G which has had tons of kernel and driver problems but
> > is now working. "Until the next update."
> >
> > Good luck, Jerry
> >
> > -----Original Message-----
> >
> >
> >
> >
> >
> > I tried the legacy driver per the wiki instructions
> >
> >
> > [https://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes#Legacy%20Driver]
> >
> >
> > because I've been having trouble with X freezing after resuming from
> >
> >
> > suspend (bug #582057 in xserver-xorg-video-intel
> >
> >
> > [
> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/582057]
> ).
> >
> >
> >
> >
> >
> > After booting, the screen cycled repeatedly between trying to load GDM
> >
> >
> > and crashing, obviously rendering the driver unusable on my system.
> >
> >
> >
> >
> >
> > System:
> >
> >
> >
> >
> >
> > Ubuntu 10.04.1 LTS
> >
> >
> > Linux 2.6.32-24-generic
> >
> >
> >
> >
> >
> > Graphics:
> >
> >
> >
> >
> >
> > 00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL
> >
> >
> > Integrated Graphics Controller (rev 04)
> >
> >
> >
> >
> >
> >
> >
> >
> > Sincerely,
> >
> >
> >
> >
> >
> > Taylor Brown
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ------------------------------
> >
> >
> >
> >
> >
> > --
> >
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> >
> >
> >
> >
> >
> > End of Ubuntu-x Digest, Vol 36, Issue 10
> >
> >
> > ****************************************
> >
> >
>
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