apport information
** Tags added: apport-collected raring
** Description changed:
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
** Attachment added: "HookError_cloud_archive.txt"
https://bugs.launchpad.net/bugs/1227583/+attachment/3829675/+files/HookError_cloud_archive.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1227583
Title:
Webcam USB bandwidth problem when connected using USB2.0 hub
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