Logs are present at https://pantheon.corp.google.com/m/cloudstorage/b/chromiumos-test-logs/o/bugfiles/cr/598922/log-032916-163247.tar.gz?debugUI=CLOUD

Sridhar observes this issue with a specific Patriot USB 3.0 stick, and while this one does not work(not being detected), another from the same type is working fine.

It is random event for this same stick to start working correctly. We might consider this bug limited to this USB stick.

I don't see the connection to power management here. Adding some components that might be relevant, but it'd be helpful if you checked what /var/log/messages says when the mount doesn't happen.

Some more observations in parallel with not mounted and not found under /media/removable
- The USB LED does not light up when plugged
- Same is observed for the same USB stick on the new RC build 7834.66.0

/var/log/messages shows ERR kernel and finally Verdict for /dev/bus/usb/001/048: DENY

2016-03-29T16:28:00.468846-07:00 NOTICE kernel: [ 7763.477446] sd 24:0:0:0: [sdb] Attached SCSI removable disk
2016-03-29T16:28:05.856851-07:00 INFO kernel: [ 7768.864196] usb 1-5: USB disconnect, device number 35
2016-03-29T16:28:09.325922-07:00 INFO kernel: [ 7772.332690] usb 1-6: new high-speed USB device number 36 using xhci_hcd
2016-03-29T16:28:09.325948-07:00 WARNING kernel: [ 7772.332822] usb 1-6: Device not responding to set address.
2016-03-29T16:28:09.526918-07:00 WARNING kernel: [ 7772.533749] usb 1-6: Device not responding to set address.
2016-03-29T16:28:09.727906-07:00 ERR kernel: [ 7772.734575] usb 1-6: device not accepting address 36, error -71
2016-03-29T16:28:09.880925-07:00 INFO kernel: [ 7772.887572] usb 1-6: new high-speed USB device number 37 using xhci_hcd
2016-03-29T16:28:09.880949-07:00 WARNING kernel: [ 7772.887679] usb 1-6: Device not responding to set address.
2016-03-29T16:28:10.081903-07:00 WARNING kernel: [ 7773.088636] usb 1-6: Device not responding to set address.
2016-03-29T16:28:10.282910-07:00 ERR kernel: [ 7773.289511] usb 1-6: device not accepting address 37, error -71
2016-03-29T16:28:10.435878-07:00 INFO kernel: [ 7773.442424] usb 1-6: new high-speed USB device number 38 using xhci_hcd
2016-03-29T16:28:10.435901-07:00 WARNING kernel: [ 7773.442550] usb 1-6: Device not responding to set address.
2016-03-29T16:28:10.636858-07:00 WARNING kernel: [ 7773.643441] usb 1-6: Device not responding to set address.
2016-03-29T16:28:10.837918-07:00 ERR kernel: [ 7773.844326] usb 1-6: device not accepting address 38, error -71
2016-03-29T16:28:10.990921-07:00 INFO kernel: [ 7773.997390] usb 1-6: new high-speed USB device number 39 using xhci_hcd
2016-03-29T16:28:10.990944-07:00 WARNING kernel: [ 7773.997497] usb 1-6: Device not responding to set address.
2016-03-29T16:28:11.191923-07:00 WARNING kernel: [ 7774.198402] usb 1-6: Device not responding to set address.
2016-03-29T16:28:11.392930-07:00 ERR kernel: [ 7774.399328] usb 1-6: device not accepting address 39, error -71
2016-03-29T16:28:11.392954-07:00 ERR kernel: [ 7774.399397] hub 1-0:1.0: unable to enumerate USB device on port 6
2016-03-29T16:29:12.458881-07:00 INFO kernel: [ 7835.455140] usb 1-5: new high-speed USB device number 40 using xhci_hcd
2016-03-29T16:29:12.458905-07:00 WARNING kernel: [ 7835.455276] usb 1-5: Device not responding to set address.
2016-03-29T16:29:12.659914-07:00 WARNING kernel: [ 7835.656208] usb 1-5: Device not responding to set address.
2016-03-29T16:29:12.860860-07:00 ERR kernel: [ 7835.857060] usb 1-5: device not accepting address 40, error -71
2016-03-29T16:29:13.013849-07:00 INFO kernel: [ 7836.009999] usb 1-5: new high-speed USB device number 41 using xhci_hcd
2016-03-29T16:29:13.013864-07:00 WARNING kernel: [ 7836.010099] usb 1-5: Device not responding to set address.
2016-03-29T16:29:13.214930-07:00 WARNING kernel: [ 7836.211145] usb 1-5: Device not responding to set address.
2016-03-29T16:29:13.415922-07:00 ERR kernel: [ 7836.412000] usb 1-5: device not accepting address 41, error -71
2016-03-29T16:29:13.568885-07:00 INFO kernel: [ 7836.564910] usb 1-5: new high-speed USB device number 42 using xhci_hcd
2016-03-29T16:29:13.568908-07:00 WARNING kernel: [ 7836.565034] usb 1-5: Device not responding to set address.
2016-03-29T16:29:13.769873-07:00 WARNING kernel: [ 7836.765985] usb 1-5: Device not responding to set address.
2016-03-29T16:29:13.970865-07:00 ERR kernel: [ 7836.966844] usb 1-5: device not accepting address 42, error -71
2016-03-29T16:29:14.123903-07:00 INFO kernel: [ 7837.119844] usb 1-5: new high-speed USB device number 43 using xhci_hcd
2016-03-29T16:29:14.123918-07:00 WARNING kernel: [ 7837.119983] usb 1-5: Device not responding to set address.
2016-03-29T16:29:14.324880-07:00 WARNING kernel: [ 7837.320983] usb 1-5: Device not responding to set address.
2016-03-29T16:29:14.525901-07:00 ERR kernel: [ 7837.521789] usb 1-5: device not accepting address 43, error -71
2016-03-29T16:29:14.525917-07:00 ERR kernel: [ 7837.521832] hub 1-0:1.0: unable to enumerate USB device on port 5
2016-03-29T16:29:19.186867-07:00 INFO kernel: [ 7842.181995] usb 1-6: new high-speed USB device number 44 using xhci_hcd
2016-03-29T16:29:19.186887-07:00 WARNING kernel: [ 7842.182120] usb 1-6: Device not responding to set address.
2016-03-29T16:29:19.387881-07:00 WARNING kernel: [ 7842.383116] usb 1-6: Device not responding to set address.
2016-03-29T16:29:19.588916-07:00 ERR kernel: [ 7842.583881] usb 1-6: device not accepting address 44, error -71
2016-03-29T16:29:19.741924-07:00 INFO kernel: [ 7842.736961] usb 1-6: new high-speed USB device number 45 using xhci_hcd
2016-03-29T16:29:19.741948-07:00 WARNING kernel: [ 7842.737118] usb 1-6: Device not responding to set address.
2016-03-29T16:29:19.942918-07:00 WARNING kernel: [ 7842.938026] usb 1-6: Device not responding to set address.
2016-03-29T16:29:20.143926-07:00 ERR kernel: [ 7843.138881] usb 1-6: device not accepting address 45, error -71
2016-03-29T16:29:20.296925-07:00 INFO kernel: [ 7843.291856] usb 1-6: new high-speed USB device number 46 using xhci_hcd
2016-03-29T16:29:20.296948-07:00 WARNING kernel: [ 7843.292009] usb 1-6: Device not responding to set address.
2016-03-29T16:29:20.497923-07:00 WARNING kernel: [ 7843.492930] usb 1-6: Device not responding to set address.
2016-03-29T16:29:20.698930-07:00 ERR kernel: [ 7843.693793] usb 1-6: device not accepting address 46, error -71
2016-03-29T16:29:20.851877-07:00 INFO kernel: [ 7843.846669] usb 1-6: new high-speed USB device number 47 using xhci_hcd
2016-03-29T16:29:20.851900-07:00 WARNING kernel: [ 7843.846794] usb 1-6: Device not responding to set address.
2016-03-29T16:29:21.052855-07:00 WARNING kernel: [ 7844.047773] usb 1-6: Device not responding to set address.
2016-03-29T16:29:21.253924-07:00 ERR kernel: [ 7844.248576] usb 1-6: device not accepting address 47, error -71
2016-03-29T16:29:21.253947-07:00 ERR kernel: [ 7844.248624] hub 1-0:1.0: unable to enumerate USB device on port 6
2016-03-29T16:29:36.081927-07:00 INFO kernel: [ 7859.074245] usb 1-5: new high-speed USB device number 48 using xhci_hcd
2016-03-29T16:29:36.093849-07:00 INFO kernel: [ 7859.086908] usb 1-5: New USB device found, idVendor=13fe, idProduct=5200
2016-03-29T16:29:36.093871-07:00 INFO kernel: [ 7859.086932] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
2016-03-29T16:29:36.093874-07:00 INFO kernel: [ 7859.086949] usb 1-5: Product: Patriot Memory
2016-03-29T16:29:36.093877-07:00 INFO kernel: [ 7859.086962] usb 1-5: Manufacturer:         
2016-03-29T16:29:36.093880-07:00 INFO kernel: [ 7859.086974] usb 1-5: SerialNumber: 07013B05D7C22064
2016-03-29T16:29:36.094833-07:00 INFO kernel: [ 7859.087797] scsi25 : usb-storage 1-5:1.0
2016-03-29T16:29:36.108850-07:00 WARNING permission_broker[553]: Did not read complete udev event.
2016-03-29T16:29:36.108885-07:00 INFO permission_broker[553]: ProcessPath(/dev/bus/usb/001/048)
2016-03-29T16:29:36.116096-07:00 INFO permission_broker[553]:   AllowUsbDeviceRule: ALLOW
2016-03-29T16:29:36.116118-07:00 INFO permission_broker[553]:   AllowTtyDeviceRule: IGNORE
2016-03-29T16:29:36.126203-07:00 INFO permission_broker[553]:   DenyClaimedUsbDeviceRule: DENY
2016-03-29T16:29:36.126225-07:00 INFO permission_broker[553]: Verdict for /dev/bus/usb/001/048: DENY

Activating. Please assign to the right owner and the appropriate priority.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot