Created attachment 120876 [details] dmesg showing warning Kernel log shows that a WARN_ON is triggered when the monitor is switched off
Can you see if this commit helps any? https://github.com/skeggsb/nouveau/commit/9862b21a0e888c34a7dad248036392e55bf75b02
That seems to fix the issue.
This has been fixed by the commit pointed by Ben. Please reopen if you still get the issue. Thanks for reporting this.
*** This bug has been marked as a duplicate of bug 92307 ***
*** Bug 94373 has been marked as a duplicate of this bug. ***
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