First, find the last -rc kernel works and the first -rc kernel doesn’t work from http://kernel.ubuntu.com/~kernel-ppa/mainline/
Then, $ sudo apt build-dep linux $ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git $ cd linux $ git bisect start $ git bisect good $(the working version you found) $ git bisect bad $(the non-working version found) $ make localmodconfig $ make -j`nproc` deb-pkg Install the newly built kernel, then reboot with it. If it still have the same issue, $ git bisect bad Otherwise, $ git bisect good Repeat to "make -j`nproc` deb-pkg" until you find the offending commit. -- 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/1901089 Title: Ubuntu kernels 5.4.0-51 and 5.4.0-52 break ir-keytable loading Status in linux package in Ubuntu: Incomplete Bug description: I run mythtv on Ubuntu 20.04 and I used a custom remote control keymap in /etc/rc_keymaps to correctly map buttons on my IR remote. The above kernel seems to break custom keymap loading for my remote (certain buttons no longer work in mythtv). Reverting to kernel 5.4.0-48 corrects the problem. Description: Ubuntu 20.04.1 LTS Release: 20.04 linux-image-5.4.0-52-generic: Installed: 5.4.0-52.57 Candidate: 5.4.0-52.57 Version table: *** 5.4.0-52.57 500 500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status belongs to the linux source package ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-52-generic 5.4.0-52.57 ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60 Uname: Linux 5.4.0-48-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: pdaniel 1552 F.... pulseaudio /dev/snd/controlC0: pdaniel 1552 F.... pulseaudio CasperMD5CheckResult: skip Date: Thu Oct 22 16:16:58 2020 InstallationDate: Installed on 2017-04-17 (1284 days ago) InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412) MachineType: MSI MS-7792 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic root=UUID=38b7dfb0-9848-4919-890b-fdc027e936f1 ro radeon.dpm=0 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.4.0-48-generic N/A linux-backports-modules-5.4.0-48-generic N/A linux-firmware 1.187.3 SourcePackage: linux UpgradeStatus: Upgraded to focal on 2020-05-11 (164 days ago) dmi.bios.date: 02/12/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V2.4 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: FM2-A75IA-E53 (MS-7792) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.4:bd02/12/2015:svnMSI:pnMS-7792:pvr1.0:rvnMSI:rnFM2-A75IA-E53(MS-7792):rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: MS-7792 dmi.product.sku: To be filled by O.E.M. dmi.product.version: 1.0 dmi.sys.vendor: MSI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1901089/+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