This is a kernel issue and most likely caused by bad hardware or buggy drivers.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to v4l-utils in Ubuntu. https://bugs.launchpad.net/bugs/1731416 Title: libv4l-0 freezes mouse and keyboard with Logitech QuickCam 4000 Status in v4l-utils package in Ubuntu: New Bug description: I've recently moved from FC25 to KUbuntu 17.10 and the video- surveillance program is causing the system to freeze all usb peripherals (mouse, keyboard, bluetooth, etc...). As a consequence the only solution is to remote login and kill the process using the capture device. Camera: Logitech QuickCam 4000 Pro USB (old model) I've tried with newer webcams and it works. Steps: - Start any video capturing program e.g. vlc - start video Capture with Ctrl-C with the default Video Camera - After 1-2 frames the systems freezes - Killing the application, unfreezes the system The dmesg is full of repeated messages: Nov 10 09:02:50 pceet070 kernel: [54333.596539] xhci_hcd 0000:00:14.0: ERROR unknown event type 37 ... Nov 10 09:02:50 pceet070 kernel: [54333.599623] xhci_hcd 0000:00:14.0: ERROR unknown event type 37 Nov 10 09:03:17 pceet070 kernel: [54361.410778] usb 3-10: reset high-speed USB device number 7 using xhci_hcd Nov 10 09:03:17 pceet070 kernel: [54361.534035] pwc: Failed to set LED on/off time (-110) Nov 10 09:03:23 pceet070 kernel: [54366.654102] pwc: Failed to power off camera (-110) Nov 10 09:03:23 pceet070 kernel: [54366.882544] usb 3-10: device descriptor read/64, error -110 Nov 10 09:06:10 pceet070 colord[1155]: failed to get session [pid 14132]: No data available Trying to debug with a simplified grabbing program https://github.com/vlachoudis/motion_detect The freezing happens at the v4l2_ioctl(.., VIDIOC_DQBUF, ...) Removing the NONBLOCK from the open() of the handle it freezes with other messages 00000008047a3000 seg-end 00000008047a3ff0 [55505.385380] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 10 comp_code 13 [55505.385388] xhci_hcd 0000:00:14.0: Looking for event-dma 00000008047a20d0 trb-start 00000008047a3f30 trb-end 00000008047a3f30 seg-start 00000008047a3000 seg-end 00000008047a3ff0 [55505.386392] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 10 comp_code 13 [55505.386400] xhci_hcd 0000:00:14.0: Looking for event-dma 00000008047a20e0 trb-start 00000008047a3f30 trb-end 00000008047a3f30 seg-start 00000008047a3000 seg-end 00000008047a3ff0 Please let me know what other tests I can perform to further debug the problem Thanks in advance Vasilis To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/v4l-utils/+bug/1731416/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
