When I try to stream 2 usb 1.1 webcams through a usb 2.0 hub I get this in /var/log/messages: ehci_hcd 0000:00:1d.7: iso sched full ffff8800bc4cd3c0 (now 2635 max 10827) cannot submit datapipe for urb 0, error -28: not enough bandwidth It happens within a couple of seconds when I try to do it. If I plug the cameras to different usb ports not through the hub it works just fine. I am using gstreamer to stream the cameras. Reproducible: Always Steps to Reproduce: 1.gst-launch-0.10 v4l2src device=/dev/video0 ! image/jpeg,width=320,height=240,framerate=15/1 ! jpegdec ! ffmpegcolorspace ! ximagesink & 2.gst-launch-0.10 v4l2src device=/dev/video1 ! image/jpeg,width=320,height=240,framerate=15/1 ! jpegdec ! ffmpegcolorspace ! ximagesink 3.check /var/log/messages Actual Results: Gstreamer says /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Error starting streaming capture from device '/dev/video1'. the logs show the bandwidth problems Expected Results: Both cameras should start streaming without any errors. If I try the same procedure through a usb 1.1 hub it works as expected. This is tested on 2.6.28-gentoo-r5 on x86_64 and on 2.6.28 and 2.6.29 on arm beagleboard. On the arm beagleboard it works ok through musb port but not through ehci usb port. Output from emerge --info: Portage 2.1.6.13 (default/linux/amd64/2008.0, gcc-4.3.3, glibc-2.10.1-r0, 2.6.28-gentoo-r5 x86_64) ================================================================= System uname: Linux-2.6.28-gentoo-r5-x86_64-Intel-R-_Core-TM-2_Duo_CPU_P8400_@_2.26GHz-with-gentoo-2.0.0 Timestamp of tree: Tue, 19 May 2009 14:00:01 +0000 ccache version 2.4 [disabled] app-shells/bash: 4.0_p24 dev-java/java-config: 2.1.7 dev-lang/python: 2.5.4-r2, 2.6.2 dev-util/ccache: 2.4-r8 dev-util/cmake: 2.6.4 sys-apps/baselayout: 2.0.0 sys-apps/openrc: 0.4.3-r2 sys-apps/sandbox: 1.9 sys-devel/autoconf: 2.13, 2.63-r1 sys-devel/automake: 1.5, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.19.1-r1 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6a virtual/os-headers: 2.6.29 ACCEPT_KEYWORDS="amd64 ~amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=core2 -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /var/lib/hsqldb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/udev/rules.d" CXXFLAGS="-march=core2 -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="ftp://gentoo.arcticnetwork.ca/pub/gentoo/ http://gentoo.arcticnetwork.ca/source/ ftp://mirrors.tera-byte.com/pub/gentoo http://gentoo.mirrors.tera-byte.com/ http://mirror.csclub.uwaterloo.ca/gentoo-distfiles/ ftp://mirror.csclub.uwaterloo.ca/gentoo-distfiles/ ftp://distro.ibiblio.org/pub/linux/distributions/gentoo/ http://distro.ibiblio.org/pub/linux/distributions/gentoo/ ftp://ftp.gtlib.gatech.edu/pub/gentoo http://www.gtlib.gatech.edu/pub/gentoo http://gentoo.cites.uiuc.edu/pub/gentoo/ ftp://gentoo.cites.uiuc.edu/pub/gentoo/ " LDFLAGS="-Wl,-O1" LINGUAS="en en_US ca en_CA bg" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 bash-completion berkdb bluetooth branding bzip2 cairo cdr cli consolekit cracklib crypt css cups dbus dri dvb dvd dvdr exif faac faad ffmpeg flac fortran gdbm gnome gnome-keyring gphoto2 gpm gstreamer gtk hal iconv ipv6 irda isdnlog java java6 jpeg lame laptop libnotify mad midi mmx mp3 mpeg mplayer mudflap multilib nautilus ncurses networkmanager nls nptl nptlonly nsplugin ogg opengl openmp pam pcre perl png policykit pppd pulseaudio python readline reflection samba session spl sse sse2 ssl sysfs syslog tcpd theora threads tiff truetype unicode usb v4l v4l2 vorbis wifi x264 xcomposite xinerama xorg xulrunner xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CAMERAS="ptp2" ELIBC="glibc" INPUT_DEVICES="evdev keyboard mouse synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en en_US ca en_CA bg" USERLAND="GNU" VIDEO_CARDS="vesa radeon radeonhd fglrx" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY
Created attachment 191825 [details] /var/log/messages with the error
please attach the output of lsusb -v with hub and camera attached.
Created attachment 192135 [details] output of lsusb -v The cameras in question are the Logitech, Inc. QuickCam for Notebook Deluxe and the hub appears as NEC Corp. HighSpeed Hub
Let's move to filing this upstream.. Can you reproduce on the latest vanilla kernel release, currently v2.6.30?
With 2.6.30 vanilla sources I get only a couple of these: uhci_hcd 0000:00:1d.1: reserve dev 3 ep81-ISO, period 1, phase 0, 608 us Jun 22 16:45:31 MARTO [ 1317.511268] uhci_hcd 0000:00:1d.1: bandwidth allocation failed: period 1, phase 0, 620 + 608 us Jun 22 16:45:31 MARTO [ 1317.511271] gspca: usb_submit_urb [0] err -28 Jun 22 16:45:31 MARTO [ 1317.519905] uhci_hcd 0000:00:1d.1: reserve dev 3 ep83-ISO, period 1, phase 0, 34 us Jun 22 16:45:32 MARTO [ 1319.149261] zc3xx: probe 2wr ov vga 0x0000 Jun 22 16:45:33 MARTO [ 1319.517249] uhci_hcd 0000:00:1d.1: bandwidth allocation failed: period 1, phase 0, 654 + 408 us Jun 22 16:45:33 MARTO [ 1319.517252] gspca: usb_submit_urb [0] err -28 And then the streaming works. The interesting thing is that I managed to test this on Ubuntu with kernel 2.6.27 and it was working ok there as well. I'll try this on the beagleboard as well and will report if it works with the 2.6.30.
Anything to report here?
I'm using 2.6.31-gentoo-r6 now and this still is a problem with gentoo sources. At the same time on a Ubuntu 9.10 with a 2.6.31-15-generic it works fine. Plugging into 2 different usb ports not through the hub still works but with the hub I am still getting the errors.
Ubuntu disables/enables configuration options by default. Can we get .config's for both gentoo and ubuntu's kernel.
Created attachment 211954 [details] .config gentoo This is my gentoo .config. I'll try and upload the ubuntu .config as soon as possible.
Created attachment 212378 [details] .config ubuntu Here's the ubuntu 2.6.31-15 .config
Have you tried compiling the gentoo kernel with the ubuntu config?
I can confirm this bug. It will also happen when attempting to use a USB camera and USB headset at the same time.
[1]: http://www.mail-archive.com/linux-usb@vger.kernel.org/msg00484.html There are issues with scheduling multiple full-speed USB devices on high-speed USB buses (like your hub) [1]. One quick workaround would be to plug one of the two cameras directly into a full-speed root hub on your PC. You could also buy a hub that supports a Transaction Translator (TT) for each port because your current one has a single one for the whole hub ("Single TT" line in your lsusb). Finally, you can also try some software solutions like playing around with the following kernel options: a) CONFIG_USB_EHCI_TT_NEWSCHED (check out the linux-usb linked thread) b) CONFIG_USB_EHCI_SPLIT_ISO
With this option enabled I'm still getting the errors. USB_EHCI_TT_NEWSCHED=y [ 1943.423233] gspca: usb_submit_urb alt 2 err -28 Jan 26 12:10:20 MARTO kernel: [ 1944.922465] zc3xx: probe 2wr ov vga 0x0000 Jan 26 12:10:20 MARTO kernel: [ 1945.134479] ehci_hcd 0000:00:1d.7: iso sched full ffff8800bde4bc00 (now 3016 max 11208) Jan 26 12:10:20 MARTO kernel: [ 1945.134485] gspca: usb_submit_urb alt 1 err -28 Jan 26 12:10:20 MARTO kernel: [ 1945.155101] gspca: no transfer endpoint found And I couldn't find an option CONFIG_USB_EHCI_SPLIT_ISO in the menuconfig.
(In reply to comment #11) > Have you tried compiling the gentoo kernel with the ubuntu config? > Have you tried this?
I noticed in your Ubuntu config you have this set: USB_EHCI_TT_NEWSCHED But you don't in the gentoo one. Can you build this into the kernel and then retest, please. Symbol: USB_EHCI_TT_NEWSCHED Prompt: Improved Transaction Translator scheduling (EXPERIMENTAL) Depends on: USB_SUPPORT && USB_EHCI_HCD && EXPERIMENTAL Location: -> Device Drivers -> USB support (USB_SUPPORT [=y]) -> Support for Host-side USB (USB [=y]) -> EHCI HCD (USB 2.0) support (USB_EHCI_HCD [=y])
(In reply to comment #16) > I noticed in your Ubuntu config you have this set: > USB_EHCI_TT_NEWSCHED > > But you don't in the gentoo one. Can you build this into the kernel and then > retest, please. > > Symbol: USB_EHCI_TT_NEWSCHED > Prompt: Improved Transaction > Translator scheduling (EXPERIMENTAL) > Depends on: USB_SUPPORT && USB_EHCI_HCD && > EXPERIMENTAL > Location: > -> Device > Drivers > -> USB support (USB_SUPPORT [=y]) > -> Support for Host-side USB (USB [=y]) > -> EHCI HCD (USB 2.0) support (USB_EHCI_HCD [=y]) > I already tried that option. Still didn't work. See comment #14 for the output with the option enabled. I've tried it on linux-2.6.32 and doesn't work there either. Maybe the difference is that the ubuntu on my other machine is x86 not x86_64?
Can you compare the output of lsmod from the ubuntu kernel and the gentoo one? Shot in the dark: Can you build into the kernel: USB_GADGET_SELECTED USB_GADGET_DUMMMY_HCD USB_GADGET_DUALSPEED
I was experiencing the same issue on a ThinkPad W510 with a USB headset. Adding USB_EHCI_TT_NEWSCHED appears to have fixed the problem for me.
I was working now for 2 day's on the problem: "cannot submit datapipe for urb 0, error -28: not enough bandwidth". finally - u cant imagine how simple it was - i found the reason and got my usb-sound back again. the main reason was the "auto-mute feature" after changing audio source with pulse. so try to go ahead. - open gnome-alsamixer or alsamixer - switch to tab USB Mixer - and increase master volume (Speaker) from zero to more... here is the original source for this hint: http://forum.ubuntuusers.de/topic/medusa-5-1-usb-headset/#post-2532118 looks like the errormessage above has nothing todo with missing sound. hope this will help. regards ds
