This bug has been discussed on the MythTV mailing list and the problem commit has been found. https://lists.archive.carbon60.com/mythtv/users/636833
In summary the bad commit is this one:- media: rc: fix timeout handling after switch to microsecond durations BugLink: https://bugs.launchpad.net/bugs/1918516 commit 06b831588b639ad9d94e4789b0250562228722c2 upstream. Commit 528222d853f92 ("media: rc: harmonize infrared durations to microseconds") missed to switch some timeout calculations from nanoseconds to microseconds. This resulted in spurious key_up+key_down events at the last scancode if the rc device uses a long timeout (eg 100ms on nuvoton-cir) as the device timeout wasn't properly accounted for in the keyup timeout calculation. Fix this by applying the proper conversion functions. -- 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/1926030 Title: IR Remote Keys Repeat Many Times Starting with Kernel 5.8.0-49 Status in linux package in Ubuntu: Incomplete Bug description: I use an IR remote with the ir-keytable package. Everything was working fine until kernel 5.8.0-49 was automatically installed by Software Updater on Ubuntu 20.04.2. When any key is pressed on the remote, the key is repeated about 500 times. The kernel is now 5.8.0-50, and the problem persists. Other users on the MythTV mailing list are reporting the issue, and it appears that the problem is related to changes in the following files: drivers/media/rc/ir-mce_kbd-decoder.c drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c drivers/media/rc/serial_ir.c It has been reported that reverting the ir-mce_kbd-decoder.c and rc- main.c files to the older versions fixes the problem. /proc/version_signature > version.log: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18 lspci -vnvn: 00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers [8086:590f] (rev 06) Subsystem: ASUSTeK Computer Inc. Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers [1043:8694] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx- Latency: 0 Capabilities: [e0] Vendor Specific Information: Len=10 <?> Kernel driver in use: skl_uncore ir-keytable -V: IR keytable control version 1.18.0 lsb_release -rd: Description: Ubuntu 20.04.2 LTS Release: 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926030/+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
