Hello,
Thank you for the quick reply. I tested the patch and it fixes the problem
on my laptop.
What I did
- Booted linux-image-6.12.111+deb13-amd64 (Debian 6.12.111-1).
- Took drivers/hid/hid-asus.c from linux-source-6.12 6.12.111-1 and applied
0001-HID-asus-fortify-keyboard-handshake.patch (applied cleanly, with
offsets of -1 and -2 lines).
- Built only the hid_asus module against the installed headers, tested it
first with rmmod/insmod, then installed it in
/lib/modules/6.12.111+deb13-amd64/updates/ and regenerated the initramfs.
Result
- Keyboard: works now at the LightDM login screen (it did not before).
- The "Asus failed to request functions: -75" and "Failed to initialize
backlight." errors are gone, and /sys/class/leds/asus::kbd_backlight is
registered.
- Fn+F2/Fn+F3 (keyboard backlight brightness) work again.
Without the patch (6.12.111):
asus 0003:0B05:19B6.0003: Asus failed to request functions: -75
asus 0003:0B05:19B6.0003: Failed to initialize backlight.
With the patch (first test, module loaded by hand), a new non-fatal warning
appears:
asus 0003:0B05:19B6.0003: Asus handshake 5e returned invalid response:
5e ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 00 00 ... (rest zeros)
Boot log with the patched module installed:
facundo@ASUSROGG18:~$ sudo dmesg | grep -i "asus 0003"
[sudo] contraseña para facundo:
[ 2.248739] asus 0003:0B05:19B6.0003: Fixing up Asus N-Key report
descriptor
[ 2.249023] asus 0003:0B05:19B6.0003: using HID for asus::kbd_backlight
[ 2.274413] asus 0003:0B05:19B6.0003: Asus handshake 5e returned invalid
response: 5e ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 2.425178] asus 0003:0B05:19B6.0003: input,hiddev0,hidraw2: USB HID
v1.10 Keyboard [ASUSTek Computer Inc. N-KEY Device] on
usb-0000:69:00.3-1/input0
[ 2.425588] asus 0003:0B05:19B6.0004: hiddev1,hidraw3: USB HID v1.10
Device [ASUSTek Computer Inc. N-KEY Device] on usb-0000:69:00.3-1/input1
Hardware, in case it is useful: ASUS ROG Strix G18 G814FP (BIOS
G814FP.316), keyboard USB ID 0b05:19b6, bcdDevice 2.15.
Please consider including e82ae34af29e ("HID: asus: fortify keyboard
handshake") in the Debian 6.12 kernel, or confirm whether the stable series
will pick it up. Feel free to forward this result upstream. I can test
further kernels or patches if needed.
Thanks,
Facundo
*--FACUNDO M. GOMEZ*San Martín de los Andes - Neuquén - Argentina
🌱🌳🌴🌵🌲 Si no es necesario, no imprima este correo. Todos somos
responsables por el cuidado del ambiente. 🍀 🍁🍂🍃🌿
El mié, 30 sept 2026 a la(s) 11:50 a.m., Salvatore Bonaccorso (
[email protected]) escribió:
> Control: tags -1 + moreinfo
> Control: forwarded -1
> https://lore.kernel.org/regressions/[email protected]/
>
> Hi,
>
> On Tue, Sep 29, 2026 at 10:04:14PM -0300, Facundo Gomez wrote:
> > Package: src:linux
> > Version: 6.12.111-1
> > Severity: normal
> >
> > Hello,
> >
> > After upgrading from linux-image-6.12.107+deb13-amd64 to
> > linux-image-6.12.111+deb13-amd64, the built-in keyboard of my laptop no
> > longer works at the LightDM login screen. With 6.12.107 everything works.
> >
> > Hardware
> > - ASUS ROG Strix G18 G814FP, BIOS G814FP.316 (05/14/2026)
> > - Keyboard: ASUSTek "N-KEY Device", USB ID 0b05:19b6, handled by hid_asus
> >
> > System
> > - LMDE 7 (Debian 13 based), using the official Debian kernel packages
> > - LightDM + slick-greeter, Cinnamon, X11
> > - NVIDIA driver 610.43.03 (out-of-tree, DKMS). Note that the hid_asus
> > error below is logged at ~2.0 s, before the nvidia module loads (~4.4
> s).
> >
> > Symptoms with 6.12.111
> > - The keyboard works in GRUB, but not at the LightDM login screen (I have
> > to use the on-screen keyboard to log in).
> > - After logging in, the keyboard works normally, except Fn+F2/F3
> > (keyboard backlight brightness).
> > - With 6.12.107 the keyboard works everywhere, including Fn+F2/F3.
> >
> > Kernel log
> > Present only in 6.12.111, right after hid_asus binds to the device:
> >
> > [ 2.008836] asus 0003:0B05:19B6.0003: Fixing up Asus N-Key report
> > descriptor
> > [ 2.009349] asus 0003:0B05:19B6.0003: using HID for
> asus::kbd_backlight
> > [ 2.018672] asus 0003:0B05:19B6.0003: Asus failed to request
> functions:
> > -75
> > [ 2.018684] asus 0003:0B05:19B6.0003: Failed to initialize backlight.
> >
> > In 6.12.107 the same sequence appears without the last two lines. There
> > are no USB disconnect/reset events for usb 3-1 in either kernel. The
> other
> > ACPI/WMI errors (nvidia-wmi-ec-backlight AE_NOT_FOUND, unresolved
> BPWM/GPP
> > symbols) appear in both kernels.
> >
> > Workaround
> > Booting 6.12.111 with modprobe.blacklist=hid_asus on the kernel command
> > line makes the keyboard work at the login screen (Fn+F2/F3 still do not
> > work).
> >
> > Expected: keyboard works at the login screen and Fn+F2/F3 work, as in
> > 6.12.107.
> >
> > Please let me know if I can test anything else.
>
> This seems to be the ame issue as reported as regression here (but for
> the 6.18.y series):
>
> https://lore.kernel.org/regressions/[email protected]/
>
> In fact 56d1b33e644c ("HID: asus: simplify RGB init sequence") got
> backported to v6.12.108, v6.18.49, and the followup commit
> e82ae34af29e ("HID: asus: fortify keyboard handshake") is missing from
> the 6.12.y series.
>
> Can you please try to apply the following patch and see if the problem
> is gone?
>
> Regards,
> Salvatore
>
