[Bug 221778] New: [REGRESSION 6.12→6.18] ASUS N-KEY keyboard (0b05:19b6) USB resets ~1/sec under dGPU rendering load on Raphael xHCI

[Bug 221778] New: [REGRESSION 6.12→6.18] ASUS N-KEY keyboard (0b05:19b6) USB resets ~1/sec under dGPU rendering load on Raphael xHCI

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=221778

            Bug ID: 221778
           Summary: [REGRESSION 6.12→6.18] ASUS N-KEY keyboard (0b05:19b6)
                    USB resets ~1/sec under dGPU rendering load on Raphael
                    xHCI
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: high
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: m.langas55@gmail.com
        Regression: No

Hardware: ASUS ROG Strix G16 G614PM (AMD variant: Raphael iGPU + RTX 5060
Laptop dGPU), BIOS G614PM.316 (latest from ASUS).
Internal keyboard: ASUS "N-KEY Device", USB 0b05:19b6, hid-asus driver,
attached to usb 3-1 on the AMD Raphael xHCI controller (1022:15b6/15b7).

Summary: since 6.18, rendering load on the Nvidia dGPU causes the
internal keyboard's USB device to reset ~once per second
("usb 3-1: reset full-speed USB device" in dmesg — 4,557 resets in one
8h boot). The resets corrupt input below userspace: evtest on
/dev/input/event3 shows missed key presses, releases arriving seconds
late, and missing autorepeat. In games this manifests as stuck/dropped
WASD keys.

Trigger isolation:
- iGPU rendering with dGPU powered but idle: CLEAN (tested via
  supergfxctl Integrated mode).
- dGPU rendering by application: resets begin
  immediately (70 resets in the first ~2 min after game launch).

Kernels tested:
- 6.12.75 (Arch linux-lts): CLEAN — 0 resets in a full game session.
- 6.18.38 (cachyos-lts): BROKEN.
- 7.1.4 (cachyos): BROKEN (retested 2026-07-22).

Ruled out: EC reset (no effect), BIOS (already latest), hardware
(machine is clean on 6.12).

Distro: CachyOS (Arch-based, rolling). Nvidia driver 610.43.03 via
nvidia-open-dkms.

Multiple users with G614/G615 models report identical symptoms on the
same 0b05:19b6 device:
-
https://discuss.cachyos.org/t/keyboard-input-issues-on-asus-rog-strix-16-2025-with-cachyos-during-gaming/30823
- https://github.com/ublue-os/bazzite/issues/4590

I will be away from this machine until ~2026-07-24; I can respond to
questions and run tests after that. Other affected users are active in
the CachyOS thread linked above and may be able to test sooner.

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[Bug 221778] [REGRESSION 6.12→6.18] ASUS N-KEY keyboard (0b05:19b6) USB resets ~1/sec under dGPU rendering load on Raphael xHCI

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=221778

--- Comment #1 from Miguel Cervantes (m.langas55@gmail.com) ---
A note from me, I did write this with AI I'm not sure about the flow of things
yet in the linux space, I have to admit some of these processes are confusing
for me, I just want the information at the very least out there in an useful
place, I apologize in advance if there are obvious errors/things I'm omitting.

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[Bug 221778] [REGRESSION 6.12→6.18] ASUS N-KEY keyboard (0b05:19b6) USB resets ~1/sec under dGPU rendering load on Raphael xHCI

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=221778

Michał Pecio (michal.pecio@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |michal.pecio@gmail.com

--- Comment #2 from Michał Pecio (michal.pecio@gmail.com) ---
6.12 to 6.18 is a fairly large spread, and it isn't even clear if the bug is a
regression or perhaps some CachyOS vs Arch difference. And the GPU uses an out
of tree driver, hmm.

IDK about CachyOS, but Arch package archive has 'linux' (non -lts) packages for
all major versions from 6.12 to 6.18. Could you start with testing these to
find which release broke things? And try to use the same NVIDIA driver each
time, or (preferably) see if the problem occurs with Nouveau.

I would wager that resets are deliberate (HID driver seems to do that in
response to USB errors), but that still doesn't explain why USB errors occur
due to GPU activity and why some kernels work but others don't.

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