[Bug 94803] New: nouveau bug crashes kernel 4.4.6 on warm boot - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 94803] New: nouveau bug crashes kernel 4.4.6 on warm boot
Date: Sat, 02 Apr 2016 23:14:46 +0000	[thread overview]
Message-ID: <bug-94803-8800@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=94803

            Bug ID: 94803
           Summary: nouveau bug crashes kernel 4.4.6 on warm boot
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: mic.daum-Mmb7MZpHnFY@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 122684
  --> https://bugs.freedesktop.org/attachment.cgi?id=122684&action=edit
picture from stack trace taken with camera

Whenever doing a warm boot (reboot), kernel 4.4.6 crashes showing the stack
trace in the attached picture. The kernel boots fine when doing a cold start or
after pressing the reset button.

The GPU in question is a "PNY Quadro FX 580" (Tesla / G96) with two attached
monitors, both connected on display port.

The crash happens quite early when the kernel sets mode on the framebuffer.
Resolution is set to 1920x1200 px, 240x75 cols/lines.

attached:

picture of the screen showing the stack trace
dump of "nv50_disp_intr_supervisor" function from the 4.4.6 vmlinux

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