It looks like commit 14de6c44d is in the Ubuntu 4.4 based kernel(It was added to resolve bug 1542939). However, the commit was never applied to upstream 4.4. That would explain why the bug does not exist in upstream 4.4, but it does in 4.4 based Xenial.
Can you see if this bug also exists in the 4.8 based Yakkety kernel? If it does, we may just have to revert 14de6c44d in Xenial. The Yakkety kernel is available from: https://launchpad.net/~canonical-kernel-security-team/+archive/ubuntu/ppa/+build/11288461 If the bug does exist in Yakkety, we could also see if this bug still exists in current mainline: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc8 -- 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/1608236 Title: Regression: S-video output does not work Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: In Progress Bug description: Regression. S-video output can not be used. It works by 4.4.0-22-generic. xrandr tells on 4.4.0-31-generic: TV1 unknown connection (normal left inverted right x axis y axis) 848x480 50.00 + 640x480 50.00 + 1024x768 50.00 800x600 50.00 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-31-generic 4.4.0-31.50 ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jarnos 1573 F.... pulseaudio CurrentDesktop: XFCE Date: Sun Jul 31 17:15:16 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-04-28 (94 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: LENOVO 89224MG PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic root=UUID=15cc1d62-fbc6-4ce3-bf32-e35c61a921cf ro RelatedPackageVersions: linux-restricted-modules-4.4.0-31-generic N/A linux-backports-modules-4.4.0-31-generic N/A linux-firmware 1.157 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/13/06 dmi.bios.vendor: LENOVO dmi.bios.version: 63ET13WW dmi.board.name: CAPELL VALLEY(NAPA) CRB dmi.board.vendor: LENOVO dmi.board.version: Not Applicable dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnLENOVO:bvr63ET13WW:bd09/13/06:svnLENOVO:pn89224MG:pvr3000C200:rvnLENOVO:rnCAPELLVALLEY(NAPA)CRB:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A: dmi.product.name: 89224MG dmi.product.version: 3000 C200 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1608236/+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
