fmillion |
05-14-2013 04:25 PM |
What are all these USB-related kernel messages?
I have Linux running on a Sony Vaio PictureBook with a Transmeta Crusoe processor.
The syslog is constantly flooded with messages like these:
Code:
May 14 16:21:38 pcg-c1vn kernel: [57149.475222] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:40 pcg-c1vn kernel: [57151.971841] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:40 pcg-c1vn kernel: [57152.034798] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:43 pcg-c1vn kernel: [57154.532391] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:43 pcg-c1vn kernel: [57154.594358] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:45 pcg-c1vn kernel: [57157.090974] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:45 pcg-c1vn kernel: [57157.154001] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:48 pcg-c1vn kernel: [57159.651546] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:48 pcg-c1vn kernel: [57159.713510] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:50 pcg-c1vn kernel: [57162.212186] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:50 pcg-c1vn kernel: [57162.273090] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:53 pcg-c1vn kernel: [57164.771688] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:53 pcg-c1vn kernel: [57164.832719] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:55 pcg-c1vn kernel: [57167.332270] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:55 pcg-c1vn kernel: [57167.392241] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:58 pcg-c1vn kernel: [57169.891844] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:21:58 pcg-c1vn kernel: [57169.951792] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:01 pcg-c1vn kernel: [57172.452404] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:01 pcg-c1vn kernel: [57172.511384] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:03 pcg-c1vn kernel: [57175.011984] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:03 pcg-c1vn kernel: [57175.070931] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:06 pcg-c1vn kernel: [57177.571551] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:06 pcg-c1vn kernel: [57177.630533] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:08 pcg-c1vn kernel: [57180.131200] uhci_hcd 0000:00:07.2: reserve dev 3 ep83-INT, period 128, phase 0, 12 us
May 14 16:22:08 pcg-c1vn kernel: [57180.190027] uhci_hcd 0000:00:07.2: release dev 3 ep83-INT, period 128, phase 0, 12 us
As you can see, this runs every few seconds. It's filling up my logs and makes it hard to find more important messages!
Nothing seems amiss with USB itself. I have a USB network adapter and USB flash drive both working without any issues. The internal Memory Stick reader is also a USB-attached device, but I am not using it.
Can someone explain what these messages are? Did I perhaps enable some kernel option that I want to disable and recompile?
Thanks
F
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