Hi Armin Wolf, On Sun, Aug 30, 2026 at 7:59 PM Armin Wolf <[email protected]> wrote: > > Am 30.08.26 um 10:42 schrieb Salvatore Bonaccorso: > > > Control: forwarded -1 > > https://lore.kernel.org/regressions/[email protected] > > Control: tags -1 + upstream > > > > Hi > > > > In Debian, in https://bugs.debian.org/1146124, Jun Mo, reported the > > following, with a bisection result: > > > > On Sun, Aug 30, 2026 at 12:59:45PM +0800, Jun MO wrote: > >> Dear Maintainer, > >> > >> Fn hotkeys on Lenovo ThinkPad SL400, which are supported by the > >> module asus-laptop, no longer work starting from Linux 7.1. Normally > >> when those keys/key combinations are pressed, > >> acpi_listen/kacpimon/"evtest > >> /dev/input/by-path/platform-asus_laptop-event" will capture related > >> events, for example: > >> > >> $ acpi_listen > >> ^[[1;2Photkey ATK0101:00 00000032 00000000 > >> button/mute MUTE 00000080 00000000 K > >> ^C > >> > >> Starting from Linux 7.1, there are not any related event captured by those > >> command. > >> > >> Using snapshot.debian.org, I found out that the last working kernel > >> version is 7.0.14-1 while the first not working version is 7.1~rc2-1~exp1. > >> > >> Following instructions in [1] and using /boot/config-7.0.14+deb14-amd64, a > >> bisect resulted in: > >> > >> git bisect start > >> # status: waiting for both 'good' and 'bad' commits > >> # good: [458c6079fc1d41d564c37679c8ace02cd83ee817] Linux 7.0.14 > >> git bisect good 458c6079fc1d41d564c37679c8ace02cd83ee817 > >> # status: waiting for 'bad' commit, 1 'good' commit known > >> # bad: [7fd2df204f342fc17d1a0bfcd474b24232fb0f32] Linux 7.1-rc2 > >> git bisect bad 7fd2df204f342fc17d1a0bfcd474b24232fb0f32 > >> # good: [028ef9c96e96197026887c0f092424679298aae8] Linux 7.0 > >> git bisect good 028ef9c96e96197026887c0f092424679298aae8 > >> # good: [334fbe734e687404f346eba7d5d96ed2b44d35ab] Merge tag > >> 'mm-stable-2026-04-13-21-45' of > >> git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm > >> git bisect good 334fbe734e687404f346eba7d5d96ed2b44d35ab > >> # good: [cdd4dc3aebeab43a72ce0bc2b5bab6f0a80b97a5] Merge tag > >> 'ntfs-for-7.1-rc1-v2' of > >> git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs > >> git bisect good cdd4dc3aebeab43a72ce0bc2b5bab6f0a80b97a5 > >> # bad: [beaba8bfbb91e3bb3133eacacd62fd6fea515e34] Merge tag > >> 'probes-v7.1-2' of > >> git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace > >> git bisect bad beaba8bfbb91e3bb3133eacacd62fd6fea515e34 > >> # good: [bea8d77e45a8b77f2beca1affc9aa7ed28f39b17] Merge tag > >> 'staging-7.1-rc1' of > >> git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging > >> git bisect good bea8d77e45a8b77f2beca1affc9aa7ed28f39b17 > >> # bad: [065c4e67cc2c40e6dd94649e8e720096fbabd4ee] Merge tag > >> 'uml-for-7.1-rc1' of > >> git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux > >> git bisect bad 065c4e67cc2c40e6dd94649e8e720096fbabd4ee > >> # good: [4b0b946019e7376752456380b67e54eea2f10a7c] Merge tag 'for-linus' > >> of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma > >> git bisect good 4b0b946019e7376752456380b67e54eea2f10a7c > >> # bad: [d6116d86e58a04a9522e349c4a27145521c01ad7] platform/x86: int3472: > >> Use local variable for LED struct access > >> git bisect bad d6116d86e58a04a9522e349c4a27145521c01ad7 > >> # good: [19ebacfb442b83aa5fe75f9c6851b4edbfff3760] platform/x86: > >> dell/dell-rbtn: Convert ACPI driver to a platform one > >> git bisect good 19ebacfb442b83aa5fe75f9c6851b4edbfff3760 > >> # bad: [378500dc1313e2c06a2f675bb00ab5d7880433ba] platform/x86: > >> asus-laptop: Register ACPI notify handler directly > >> git bisect bad 378500dc1313e2c06a2f675bb00ab5d7880433ba > >> # good: [03ae0a0d0973b9e584a05136aab08fee2ef8e455] platform/x86: > >> uniwill-laptop: Implement USB-C power priority setting > >> git bisect good 03ae0a0d0973b9e584a05136aab08fee2ef8e455 > >> # good: [b0bcf48c74cc7f72d1b6effc7cecdae871b1785e] platform/x86: > >> toshiba_acpi: Register ACPI notify handler directly > >> git bisect good b0bcf48c74cc7f72d1b6effc7cecdae871b1785e > >> # good: [553b2ac59fbb434330287fde0cabc64bc6f11ceb] platform/x86: > >> toshiba_bluetooth: Convert ACPI driver to a platform one > >> git bisect good 553b2ac59fbb434330287fde0cabc64bc6f11ceb > >> # good: [3a96c7915d93231e128df74901fe8fcb960b0ecb] platform/x86: > >> toshiba_haps: Convert ACPI driver to a platform one > >> git bisect good 3a96c7915d93231e128df74901fe8fcb960b0ecb > >> # first 'bad' commit: [378500dc1313e2c06a2f675bb00ab5d7880433ba] > >> platform/x86: asus-laptop: Register ACPI notify handler directly > >> > >> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1143721#15 > > #regzbot introduced: 378500dc1313e2c06a2f675bb00ab5d7880433ba > > #regzbot link: https://bugs.debian.org/1146124 > > > > Does this rings a bell? > > I think i found the culprit, could you please test the attached patch?
Build the module with the patch(only "make -C . M=drivers/platform/x86") and load the built drivers/platform/x86/asus-laptop.ko, now the Fn hotkeys works again. Thanks! Regards, Jun MO > > Thanks, > Armin Wolf > > > > > Regards, > > Salvatore > >
