The system log gets spammed via dmesg with several of the following errors per second:
Oct 11 22:53:39 base kernel: [ 2147.766956] scsi host5: __pm_runtime_resume()!
Oct 11 22:53:39 base kernel: [ 2147.766962] scsi host5: __pm_runtime_resume() returns 1!
Apparently this refers to my DVD drive, according to the /proc files:
Host: scsi5 Channel: 00 Id: 01 Lun: 00
Vendor: HL-DT-ST Model: DVDRAM GSA-4163B Rev: A100
Type: CD-ROM ANSI SCSI revision: 05
% cat /proc/scsi/sg/devices
5 0 1 0 5 1 1 0 1
% cat /proc/scsi/sg/device_strs
HL-DT-ST DVDRAM GSA-4163B A100
This might be caused by CONFIG_PM_DEBUG=y, and might actually be expected.
In this case, please excuse this report then - but consider making it less
My /proc/config.gz unzipped: http://pastebin.com/knXt8nmw
lspci -vvv: http://pastebin.com/iMWbaUPC
Might this be related to the writer failing to detect rewritable media? (which might be a regression I still would have to investigate deeper into)
(This might be related to https://bugzilla.kernel.org/show_bug.cgi?id=19712 - where only a "__pm_runtime_resume()!" is posted repeatedly.)
This is related to CONFIG_PM_VERBOSE=y, unsetting it does not cause this message spam.
Is this intentional?
Does it indicate some bug or broken hardware?
I can confirm this logspam. In my case it relates to SCSI host 3, "CDDVDW SH-S223F", a DVD writer. (The writer contains no media.)