[arch-general] Kernel 3.2.1 woes

[Norbert Zeh]

fredbezies [2012.01.23 0736 +0100]:
> 2012/1/23 Norbert Zeh <nzeh at cs.dal.ca>
> 
> > Hi folks,
> >
> > just a heads up (and maybe request for feedback whether anybody has seen
> > similar
> > issues with this kernel upgrade).  The recent upgrade from kernel 3.1.9 to
> > 3.2.1
> > produced two graphics-related issues:
> >
> > On my dual-Opteron Asus board with an NVIDIA GeForce GTX 460, the X server
> > fails
> > to start and says that it cannot initialize the device at PCI 4:0:0 (i.e.,
> > my
> > NVIDIA card).  Downgrading to 3.1.9 fixes this issue.
> >
> > On my Core i7 Dell Latitude 6510 laptop using the on-chip graphics chip
> > and the
> > 1920x1080 laptop screen, everything is fine until I suspend the machine to
> > RAM.
> > When resuming, I get a black screen and not even rebooting brings the
> > screen
> > back to life.  I have to turn the machine off and then back on.
> >
> > In contrast, my Core i7 desktop at home with an NVIDIA Quadro NVS 450
> > works just
> > fine with the 3.2.1 kernel.
> >
> > I'm in the process of bisecting these issues (currently working on the
> > laptop
> > issue).  I remember that back in the kernel 2.6.3x days, it took a long
> > time for
> > the Dell 6510 with 1920x1080 display and Intel graphics to boot without a
> > black
> > screen at all, and I seem to recall that this was because the patch that
> > made it
> > work apparently didn't do what it was supposed to do "right".  Maybe they
> > now
> > found a way to do it right, only it doesn't work, at least after a suspend.
> >
> > Note that, even though I get a black screen after suspending, the machine
> > is
> > otherwise alive, as I can blindly switch to a TTY and reboot the machine
> > cleanly
> > from there.  Bisecting is proving a bit painful because quite a few
> > intermediate
> > versions I'm testing result in a straight kernel panic after suspend.
> >
> > Cheers,
> > Norbert
> >
> > --
> >
> > ()  ascii ribbon campaign  -  against html e-mail
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> >
> 
> Erh... Did you blacklist nouveau on your laptop or not ? Just a guess of
> course, cause it looks like a kmod bug I saw when it was in testing...

No.  I may be wrong, but I don't think this is needed here because the laptop
has an Intel graphics chip.  On the two NVIDIA boxes, nouveau is blacklisted.  I
really think this is a kernel regression because everything works as it should
with 3.1.9 but not with 3.2.1.  Apart from switching the kernel, I didn't touch
any settings and the systems are fully up to date.

- Norbert

> 
> -- 
> Frederic Bezies
> fredbezies at gmail.com


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