After disabling my terrible wireless adapter, I was able to install 3.12.0-999-generic #201309200445 and I can confirm the defect persists.
** Tags removed: kernel-unable-to-test-upstream ** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1227583 Title: Webcam USB bandwidth problem when connected using USB2.0 hub Status in “linux” package in Ubuntu: Incomplete Bug description: I have a strange problem with webcams Creative Live! Cam Sync HD VF0770 (041e:4095). I have two of them. I would like to stream simultaneous streams with 1280x720 at 5fps. When connected directly to laptop, I can do this, actually I can stream the same resolution at 30fps. But, when I plug both of them using USB hub (Gembird 7-port USB2.0 powered hub), I can stream one camera. But when starting the second one, the dmesg throws error uvcvideo: Failed to submit URB 0 (-28). and the mjpg-streamer shows Unable to start capture: No space left on device From other defects reported here I understand that this is a problem with USB bandwidth allocation. However, the USB for both cameras seems to be set at 480Mbit - this is the output of lsusb -v -t /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/5p, 480M |__ Port 4: Dev 19, If 0, Class=hub, Driver=hub/4p, 480M |__ Port 2: Dev 24, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M |__ Port 2: Dev 24, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M |__ Port 2: Dev 24, If 2, Class=audio, Driver=, 480M |__ Port 2: Dev 24, If 3, Class=audio, Driver=, 480M |__ Port 3: Dev 20, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M |__ Port 3: Dev 20, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M |__ Port 3: Dev 20, If 2, Class=audio, Driver=, 480M |__ Port 3: Dev 20, If 3, Class=audio, Driver=, 480M |__ Port 4: Dev 21, If 0, Class=hub, Driver=hub/4p, 480M I tried lowering the resolution for both cams to 320x240, minimum fps for the camera is 5, so I can't go any lower than that. Can anyone, please, point me out how can I investigate this problem further? --- ApportVersion: 2.9.2-0ubuntu8.3 Architecture: amd64 DistroRelease: Ubuntu 13.04 MarkForUpload: True Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash Tags: raring Uname: Linux 3.9.0-030900rc3-generic x86_64 UnreportableReason: The running kernel is not an Ubuntu kernel UpgradeStatus: Upgraded to raring on 2013-07-09 (72 days ago) UserGroups: adm cdrom davfs2 dialout dip fuse i2c lpadmin plugdev sudo To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1227583/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
