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