[Intel-gfx] Regression: bisected: commit 7c510133d93 breaks video

[Dave Airlie]

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?

Dave.