Hi I can't easily try out the latest kernels since they mandate PAE which this system doesn't have.
I've not found the bandwidth to download the ISO but I guess that will be the same situation. I've looked at the equivalent file in the main kernel head and see that this change fixes the problem: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/sound/usb/mixer.c?id=e182534d4bd3a779941f2868f35e1f66a8d36cea I can see that this change also went into mainstream kernels 3.0.10 (commit 6861f2aa5840d7237aa0249a76ae29c939e7c93a) and 3.1.2 (commit f80f33817c973746ca0187713404461b80ef5d2d). I'm having some finger trouble rebuilding the kernel with this patch in to see if this fixes the issue - I suspect that it will - and will post the results here. thanks for your time Andy -- 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/1265103 Title: 046d:09a4 USB mixer quirks not applied correctly for Logitech E3500 webcam microphone Status in “linux” package in Ubuntu: Incomplete Bug description: Having problems getting microphone working on Logitech E3500 webcam. It's worked before but I can't say when. I noticed messages from snd-usb-audio relating to "Unlikely big volume range" which at first glance at the code in sound/usb/mixer.c in volume_control_quirks shouldn't happen since the quirk handler should fix things. So I added some debug into the module and see that the quirk handler code compares kctl->id.name against "Mic Capture Volume" and this test fails every time. This appears to be because the quirk handler code is called via get_min_max_with_quirks from build_feature_ctl immediately before the block of code which creates the kctl->id.name string. With my debug added to sound/usb/mixer.c, I see: [53438.864077] usb 1-1: new high-speed USB device number 8 using ehci_hcd [53439.105737] uvcvideo: Found UVC 1.00 device <unnamed> (046d:09a4) [53439.133317] input: UVC Camera (046d:09a4) as /devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/input/input12 [53440.136199] 8:3:1: cannot get freq at ep 0x86 [53440.136447] usb_audio:1165:f11b3700:: Debug line 1165 shows the current value of kctl->id.name is empty just before the call to get_min_max_with_quirks in build_feature_ctl, just before the "switch (control)" line. [53440.136456] usb_audio:936:f11b3700 [53440.136463] usb_audio: 806 f11b3700 Debug line at 806 at top of volume_control_quirks shows valid kctl is passed in [53440.136469] usb_audio:826:: Debug line at 826 shows kctl->id.name is empty so no quirk is applied [53440.136480] usb_audio:1216:f11b3700:Mic Capture Switch: Debug line at 1216 shows that after the "switch (control)" block the kctl->id.name is now set up [53440.136492] usb_audio:1165:f11b3200:: Repeat the above for the Mic Capture Volume, the interesting control [53440.907700] usb_audio:936:f11b3200 [53440.907710] usb_audio: 806 f11b3200 Debug line at 806 at top of volume_control_quirks shows valid kctl is passed in [53440.907717] usb_audio:826:: Debug line at 826 shows kctl->id.name is empty so no quirk is applied [53440.907728] usb_audio:1216:f11b3200:Mic Capture Volume: Debug line at 1216 shows that after the "switch (control)" block the kctl->id.name is now set up [53440.907736] usb_audio: Warning! Unlikely big volume range (=3072), cval->res is probably wrong. [53440.907748] usb_audio: [5] FU [Mic Capture Volume] ch = 1, val = 5888/8960/1 And then we get the warning that the volume range is bad because the quirk handler didn't get applied My guess is that this causes the microphone to not have its input range adjusted as expected and thus it only ever picks up silence. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-57-generic 3.2.0-57.87 ProcVersionSignature: Ubuntu 3.2.0-57.87-generic 3.2.52 Uname: Linux 3.2.0-57-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.6 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: andy 2322 F.... pulseaudio /dev/snd/controlC0: andy 2322 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with AD1981B at irq 9' Mixer name : 'Analog Devices AD1981B' Components : 'AC97a:41445374' Controls : 28 Simple ctrls : 20 Card1.Amixer.info: Card hw:1 'U0x46d0x9a4'/'USB Device 0x46d:0x9a4 at usb-0000:00:1d.7-1, high speed' Mixer name : 'USB Mixer' Components : 'USB046d:09a4' Controls : 2 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'Mic',0 Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum Capture channels: Mono Limits: Capture 0 - 3072 Mono: Capture 3069 [100%] [34.98dB] [on] Date: Tue Dec 31 01:08:46 2013 HibernationDevice: RESUME=UUID=6eb2f8e7-fadb-4e67-b648-c7d4016d49ad InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Release i386 (20120423) MachineType: Sony Corporation VGN-S2HP(GB) MarkForUpload: True ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-57-generic root=UUID=519c7823-96d8-4c6b-81f9-f04e64f4cab6 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-57-generic N/A linux-backports-modules-3.2.0-57-generic N/A linux-firmware 1.79.9 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/18/2004 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: R0071G4 dmi.chassis.asset.tag: 6D1M000000000000000000190000 dmi.chassis.type: 10 dmi.chassis.vendor: Sony Corporation dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR0071G4:bd10/18/2004:svnSonyCorporation:pnVGN-S2HP(GB):pvrJ000JCYU:cvnSonyCorporation:ct10:cvrN/A: dmi.product.name: VGN-S2HP(GB) dmi.product.version: J000JCYU dmi.sys.vendor: Sony Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1265103/+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
