[Bug 102648] New: unable to use nvidia gpu after suspend - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 102648] New: unable to use nvidia gpu after suspend
Date: Mon, 11 Sep 2017 03:13:04 +0000	[thread overview]
Message-ID: <bug-102648-8800@http.bugs.freedesktop.org/> (raw)


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https://bugs.freedesktop.org/show_bug.cgi?id=102648

            Bug ID: 102648
           Summary: unable to use nvidia gpu after suspend
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: razorsis100-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 134145
  --> https://bugs.freedesktop.org/attachment.cgi?id=134145&action=edit
dmesg with the problem before and after suspend

Os: Arch X86_64 Updated regularly
System : Notebook Asus X556UR

Tried with bumblebee nvidia:
Works perefectly after boot
but after a suspend/wake optirun output: Failed to initialize secondary GPU

only way to make it work again is: 
reboot or pci bus remove/rescan(doesn't work sometimes)

So I consulted with Lekensteyn and did numerous testings
checked nvidia card powermanagement, parent bus power mangement
PM is on for both but it just doesn't work after suspend/wake

switched to nouveau (removed bumblebee nvidia)
tested with lspci, no errors after boot
but after suspend/wake: DRM: failed to idle channel 0 [DRM]

So he suggested to file a bug for nouveau with kernel log and acpidump

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