defective ir-keytable udev rule → custom keytable does not get loaded

[Tore Anderson]

ir-keytable v1.18.0-2build1 ships /lib/udev/rules.d/60-ir-keytable.rules containing the following rule:

ACTION=="add", SUBSYSTEM=="rc", RUN+="/usr/bin/ir-keytable -a /etc/rc_maps.cfg -s $name"

After upgrading to Focal, this does not get triggered at boot, nor if I (re)insert my receiver when the system is running. Therefore, the custom keytable does not get loaded.

This is the udev events that occur when I insert the receiver:

$ sudo udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[1195.829011] add /devices/pci0000:00/0000:00:14.0/usb1/1-3 (usb)
KERNEL[1195.834989] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0 (usb)
KERNEL[1195.874055] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/rc/rc0/lirc0 (lirc)
KERNEL[1195.875019] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/rc/rc0/input11 (input)
KERNEL[1195.875183] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/rc/rc0/input11/event3 (input)
KERNEL[1196.134164] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/wakeup/wakeup21 (wakeup)
KERNEL[1196.134448] bind /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0 (usb)
KERNEL[1196.134704] bind /devices/pci0000:00/0000:00:14.0/usb1/1-3 (usb)
UDEV [1196.158923] add /devices/pci0000:00/0000:00:14.0/usb1/1-3 (usb)
UDEV [1196.174559] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0 (usb)
UDEV [1196.194750] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/rc/rc0/lirc0 (lirc)
UDEV [1196.196268] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/rc/rc0/input11 (input)
UDEV [1196.197180] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/wakeup/wakeup21 (wakeup)
UDEV [1196.224577] add /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/rc/rc0/input11/event3 (input)
UDEV [1196.231346] bind /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0 (usb)
UDEV [1196.244978] bind /devices/pci0000:00/0000:00:14.0/usb1/1-3 (usb)

Note how there's no «(rc)» displayed on any of the lines, which means that the «SUBSYSTEM=="rc"» condition from the udev rule filters all of the above events.

I found a rule that works at https://<email address hidden>/msg117165.html:

ACTION=="add", SUBSYSTEM=="input", SUBSYSTEMS=="rc", KERNEL=="event*", ENV{.rc_sysdev}="$id", RUN+="/usr/bin/ir-keytable -a /etc/rc_maps.cfg -s $env{.rc_sysdev}"

Creating a custom /etc/udev/rules.d/60-ir-keytable.rules file containing this rule solves the problem; now my custom keymap is loaded at boot, as it did before (when I was running Bionic).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ir-keytable 1.18.0-2build1 [modified: usr/bin/ir-keytable]
ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73
Uname: Linux 5.4.0-56-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Dec 6 18:05:06 2020
SourcePackage: v4l-utils
UpgradeStatus: Upgraded to focal on 2020-12-06 (0 days ago)

[Gregor Jasny (gjasny)]

Hi,

the issue is the same as in LP #1903966. The following commit should fix it also for the 1.18 version:

  https://salsa.debian.org/debian/libv4l/-/commit/e12bd27aa844663601d81c99ecbdff33c9b5e9f3

Until the version in focal is fixed, you could use the v4l-utils-stable PPA:

  https://code.launchpad.net/~libv4l/+archive/ubuntu/stable

The (pending) Build recipe is here:
https://code.launchpad.net/~libv4l/+recipe/v4l-utils-stable-1.20

Thanks,
Gregor

[Sebastien Bacher (seb128)]

Thank you for your bug report, that's what got fixed in https://bugs.launchpad.net/ubuntu/+source/v4l-utils/1.20.0-2 right ?

[Tore Anderson (toreanderson)]

Probably. My (fully updated) 20.04.1 LTS box is still at version 1.18.0-2build1, though.

[Launchpad Janitor (janitor)]

[Expired for v4l-utils (Ubuntu) because there has been no activity for 60 days.]