[CFT] drm updates

[Robert Noland]

On Fri, 2008-08-29 at 12:54 +0200, Paul B. Mahol wrote:
> On 8/28/08, Robert Noland <rnoland at freebsd.org> wrote:
> > On Thu, 2008-08-28 at 20:45 +0200, Paul B. Mahol wrote:
> >> On 8/28/08, Robert Noland <rnoland at freebsd.org> wrote:
> >> > On Thu, 2008-08-28 at 19:07 +0200, Paul B. Mahol wrote:
> >> >> On 8/27/08, Robert Noland <rnoland at freebsd.org> wrote:
> >> >> > On Wed, 2008-08-27 at 12:07 +0200, Paul B. Mahol wrote:
> >> >> >> On 8/26/08, Robert Noland <rnoland at freebsd.org> wrote:
> >> >> >> > On Tue, 2008-08-26 at 17:51 +0200, Paul B. Mahol wrote:
> >> >> >> >> Here is more kernel debug info (after updating libdrm and testing
> >> >> >> >> with
> >> >> >> >> glxgears)
> >> >> >> >
> >> >> >> > I don't think that the two issues are related, but try this
> >> >> >> > patch...
> >> >> >> > It
> >> >> >> > should at least, resolve the issue below.
> >> >> >> >
> >> >> >> > robert.
> >> >> >>
> >> >> >> Issue bellow is fixed, previous problem still exist.
> >> >> >>
> >> >> >> textdump of panic when unloading drm attached.
> >> >> >
> >> >> > Ok, The locking semantics are a nightmare... Give this a try, it
> >> >> > should
> >> >> > correct both the previous issue as well as this one.
> >> >> >
> >> >> > robert.
> >> >> >
> >> >>
> >> >> Panic fixed, now only Xorg crashing when using glxgears (,...) remains
> >> >> ;)
> >> >
> >> > Ok, what hardware are you using again?  Can you manually load drm
> >> > modules and set hw.dri.0.debug=1 and send me the debug output?
> >> >
> >> > robert.
> >>
> >> Hardware: "Mobile 945GM/GU Express Integrated Graphics Controller"
> >> Debug ouptut attached.
> >
> > Alright, try this...  I was pointed at this from another thread, but
> > your trace confirms why it doesn't work, at least with your driver.
> >
> > robert.
> >
> 
> Nothing improved with that patch, still crash with glxgears, and lock
> with stellarium.

ok, I don't understand why I'm not seeing any of this on my 965gm...  If
you want to send me another debug trace, I'll see if I can tell what is
going on now... Also, please send me a copy of your xorg.conf.

> How to make sure that this is really drm problem and not i915, Xorg,
> mesa-ports that need recompiling?

If you are using current ports tree, then nothing should need rebuilding
that I can think of.  I have been using git libdrm and xf86-video-intel
driver, but what is in ports now should be fine I think.  The updated
libdrm should only be required to get the new vblank code to allow it to
disable vblank interrupts.

There is a bug which prevents vblanks irqs from being disabled after a
vt switch, but it shouldn't have a real impact on functionality.

robert.

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