https://bugs.freedesktop.org/show_bug.cgi?id=62848

          Priority: medium
            Bug ID: 62848
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: xorg not start after kexec when use nouveau
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: SuloevDmitry-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

I compile linux 3.7.0 on my machine and try boot it using kexec:
1. switch to single mode (rc single);
2. mount /boot parion (mount -oro /boot);
3. load new kernel into memory (kexec -l /boot/kernel-3.7.0 --reuse-cmdline);
4. exec new kernel (kexec -e).
After last command I see how system boots and after starting X I can see only
blank black screen with "_" in top left corner.
I don't have this problem with other drivers. Only with nouveau

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