Regression: bisected: commit 7c510133d93 breaks video

[Paul Zimmerman]

> From: Dave Airlie [mailto:airlied at gmail.com]
> Sent: Thursday, September 19, 2013 1:15 PM
> 
> On Fri, Sep 20, 2013 at 6:10 AM, Daniel Vetter <daniel at ffwll.ch> wrote:
> > On Thu, Sep 19, 2013 at 06:32:47PM +0000, Paul Zimmerman wrote:
> >> > From: Paul Zimmerman
> >> > Sent: Thursday, September 19, 2013 11:21 AM
> >> >
> >> > > From: Dave Airlie [mailto:airlied at gmail.com]
> >> > > Sent: Wednesday, September 18, 2013 7:40 PM
> >> > >
> >> > > On Thu, Sep 19, 2013 at 12:02 PM, Paul Zimmerman
> >> > > <Paul.Zimmerman at synopsys.com> wrote:
> >> > > > I have an ASUS P6X58D-Premium mobo with a GeForce 9400GT PCIe video card.
> >> > > > With kernel 3.12-rc1, I get scrambled video on boot. Kernel 3.11 works
> >> > > > fine.
> >> > > >
> >> > > > Bisecting this, I found 7c510133d93dd6f15ca040733ba7b2891ed61fd1 "drm:
> >> > > > mark context support as a legacy subsystem" is the guilty commit. If I
> >> > > > revert that commit, the video works fine.
> >> > > >
> >> > > > Is there any more info I can provide?
> >> > >
> >> > > Full dmesg, and what driver you are using.
> >> >
> >> > Driver is nouveau.
> >> >
> >> > The dmesg from a good boot with the commit reverted is attached.
> >> >
> >> > For the bad boot, the dmesg log is filled with messages like this:
> >> >
> >> > [   15.871667] nouveau E[     PFB][0000:03:00.0] trapped write at 0x01010010a0 on channel
> 0x0001fed0
> >> > [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT
> >> > [   15.871698] nouveau E[     PFB][0000:03:00.0] trapped write at 0x010100b2e0 on channel
> 0x0001fed0
> >> > [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT
> >> > [   15.871781] nouveau E[     PFB][0000:03:00.0] trapped write at 0x0101011600 on channel
> 0x0001fed0
> >> > [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT
> >> >
> >> > I will try next with the patch series you sent to Linus yesterday, to
> >> > see if that happens to fix this.
> >>
> >> Nope, with your patch series from yesterday the problem still exists.
> >
> > Just to double-check: Does the revert still work, even on latest upstream
> > git + Dave's pull request?
> 
> Also what versions of userspace have you got, libdrm +
> xf86-video-nouveau and mesa?

Yes, the revert still works.

I have pretty old userspace, Fedora 14.

libdrm is 2.4.22-1.fc14, mesa is 7.9-5.fc14.

I don't have xf86-video-nouveau, I have
xorg-x11-drv-nouveau.x86_64 1:0.0.16-14.20101010git8c8f15c.fc14

-- 
Paul