Same for me runnign Ubuntu Natty amd64 on a DELL XPS m1330 laptop with a nvidia 8400m.
I think this only occurs with an external monitor attached. I am not sure though.
syslog:
Quote:
Apr 4 23:07:47 laptop kernel: [ 8988.836719] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:47 laptop kernel: [ 8988.917233] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:47 laptop kernel: [ 8988.985934] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:47 laptop kernel: [ 8989.064247] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:47 laptop kernel: [ 8989.135385] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:47 laptop kernel: [ 8989.214427] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:47 laptop kernel: [ 8989.285203] NVRM: Xid (0000:01:00): 6, PE0001
Apr 4 23:07:48 laptop kernel: [ 8989.365556] NVRM: Xid (0000:01:00): 6, PE0001
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I waited for some time and it recovered automatically.