** Tags added: kernel-daily-bug -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.10 in Ubuntu. https://bugs.launchpad.net/bugs/1929157
Title: Intel IPU6 camera: Microsoft Teams can not access the webcam for few minutes when it starts Status in HWE Next: Fix Released Status in linux-oem-5.10 package in Ubuntu: Invalid Status in linux-oem-5.10 source package in Focal: Fix Released Bug description: [SRU Justification] [Impact] Intel IPU6 camera driver includes a test pattern generator for early stage development before hardware ready. This driver exposes additional device nodes up to 24 of them as video devices. While Microsoft Teams, and maybe other video/camera apps as well, tries to locate a suitable device one by one, this may take up to minutes before returning to a usable state. [Fix] Intel resolved this by removing TPG in their kernel driver release Release_20210520 (https://github.com/intel/ipu6-drivers/commit/362375c928d184fb0b4187df7da1ffd506bbd07f). [Test Case] Before this patch, there are 25 video devices on the testing platform. One additional is created by v4l2loopback. By removing TPG as this change does, the remaining video devices should be two exactly: $ ls -al /dev/video* crw-rw----+ 1 root video 81, 0 May 25 02:08 /dev/video0 crw-rw---- 1 root video 81, 1 May 25 02:08 /dev/video1 [Where problems could occur] On this platform TPG is never used after hardware being enabled. So it's probably pretty safe to remove them. [Other Info] While Intel IPU6 driver is currently for oem-5.10 only and there is plan for newer kernels at the moment, only oem-5.10 is nominated. ========== original bug description ========== Both of snap and deb of Microsoft Teams apps take minutes to probe all video device nodes before starting up on Intel IPU6 camera platforms. It's rooted in the extra video devices created for IPU6 TPG (test pattern generator), and Intel resolved this by removing TPG in their kernel driver release Release_20210520 (https://github.com/intel/ipu6-drivers/commit/362375c928d184fb0b4187df7da1ffd506bbd07f). --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.17 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: u 2219 F.... pulseaudio CasperMD5CheckResult: skip DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-focal-amd64-20200502-85+fossa-mewtwo+X82 DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2021-05-21 (4 days ago) InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20200502-05:58 MachineType: Dell Inc. Latitude 9420 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.10.0-2026-oem root=UUID=597af0c1-07a4-45f8-9de9-77ca8ed3661d ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.10.0-2026.27+lp1926275.1.fix.ov01a1s.iq-oem 5.10.31 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.10.0-2026-oem N/A linux-backports-modules-5.10.0-2026-oem N/A linux-firmware 1.187.12 Tags: focal Uname: Linux 5.10.0-2026-oem x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True dmi.bios.date: 02/27/2021 dmi.bios.release: 1.1 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.1.1 dmi.board.vendor: Dell Inc. dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.1.1:bd02/27/2021:br1.1:svnDellInc.:pnLatitude9420:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr: dmi.product.family: Latitude dmi.product.name: Latitude 9420 dmi.product.sku: 0A32 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1929157/+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
