Hello, I can confirm that linux-image-6.12.113+deb13-amd64 fixes the problem on my ASUS ROG Strix G18 G814FP (keyboard 0b05:19b6): the keyboard works at the LightDM login screen and Fn+F2/Fn+F3 (backlight keyboard LED) work again.
hid_asus is the stock module (kernel/drivers/hid/hid-asus.ko.xz), with no local module, and the "-75" error is gone. The only remaining message is the non-fatal warning I mentioned before: asus 0003:0B05:19B6.0003: Asus handshake 5e returned invalid response: 5e ff ff ff ... >From my side the bug can be closed. Thank you for the quick help. *--FACUNDO M. GOMEZ*San Martín de los Andes - Neuquén - Argentina El jue, 1 oct 2026 a la(s) 4:26 a.m., Salvatore Bonaccorso ( [email protected]) escribió: > Control: tags -1 - moreinfo > Control: tas -1 + upstream > > Hi Facundo, > > On Wed, Sep 30, 2026 at 09:01:58PM -0300, Facundo Gomez wrote: > > 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. > > Perfect, thanks for testing. As mentioned here > https://lore.kernel.org/regressions/[email protected]/ the > fix has alrady been queued for 6.12.y. Although I will note on the > thread that you have a follow-up warning now. > > Regards, > Salvatore >
