Bug 1109505

Summary: X fails to start on GeForce 9600 GT [10de:0622] (G94) with 3.16 kernel
Product: [Fedora] Fedora Reporter: Adam Williamson <awilliam>
Component: xorg-x11-drv-nouveauAssignee: Ben Skeggs <bskeggs>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: rawhideCC: airlied, ajax, bskeggs
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2014-06-23 19:17:04 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
journal from a boot which hits the failure, with drm.debug=15 set
none
distinctive noise pattern associated with the bug none

Description Adam Williamson 2014-06-14 15:33:59 UTC 
Trying to boot a 3.16 kernel post-DRM merge - 3.16.0-0.rc0.git10.2.fc21 - on my main desktop, with the GeForce 9600 GT [10de:0622] (G94) adapter, results in the display dying when X should start up (bootsplash displays OK, and runlevel 3 boot works). Cannot reach a VT. Tested twice, first time the left head (of my two monitors) displayed a distinctive artifact pattern I've also seen when hitting a resume-from-suspend bug in 3.15 - see https://bugs.freedesktop.org/show_bug.cgi?id=77599 - second time both heads simply went into powersaving mode.

Log of a boot with drm.debug=15 set will be attached. Aside from the kernel, I have:

xorg-x11-drv-nouveau-1.0.10-4.fc21.x86_64
xorg-x11-server-common-1.15.99.902-8.20140428.fc21.x86_64
Comment 1 Adam Williamson 2014-06-14 15:35:25 UTC 
Created attachment 908798 [details]
journal from a boot which hits the failure, with drm.debug=15 set
Comment 2 Adam Williamson 2014-06-14 15:41:43 UTC 
Created attachment 908799 [details]
distinctive noise pattern associated with the bug

This is the noise pattern I saw with the first boot attempt, which I've also seen with the resume-from-suspend bug on 3.15. It's not entirely visible from my phone cam, but both the black and white blocks have red, green and blue 'noise speckles' in them.
Comment 3 Adam Williamson 2014-06-17 21:40:17 UTC 
Ben reports on IRC that he's fixed this - I'm guessing http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?h=drm-nouveau-next&id=ba5e01b0d0146c2d2bb5475cf1d6efec51bf2669 is the fix. It has to percolate through airlied up to Linus and then back into the Rawhide kernel before we can close this bug, though.
Comment 4 Adam Williamson 2014-06-20 01:26:41 UTC 
I did a scratch kernel build with the fix applied, and it looks good: I'm typing this comment from that kernel. Just have to wait for it to arrive in the official kernel build and we can close this.
Comment 5 Adam Williamson 2014-06-23 19:17:04 UTC 
3.16.0-0.rc2.git0.1.fc21.x86_64 has the fix for this, it boots fine on my affected system. Marking fixed.