RE: Regression: bisected: commit 7c510133d93 breaks video

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> From: Dave Airlie [mailto:airlied@xxxxxxxxx]
> Sent: Wednesday, September 18, 2013 7:40 PM
> 
> On Thu, Sep 19, 2013 at 12:02 PM, Paul Zimmerman
> <Paul.Zimmerman@xxxxxxxxxxxx> 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.

-- 
Paul

Attachment: dmesg-good.log
Description: dmesg-good.log

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