Total system lockups on Linux

[panther03]

I'm reporting on this because I see it as a total possibility that Phobri is the culprit and I don't want it to go undocumented, but it also could be totally my system's fault.

Randomly, on my dev machine running Ubuntu 22.04, my system will totally lock up for a few seconds, resume for just a bit, and then 100% freeze up. During the initial lock up period, sound still plays, but afterwards it's just fucked.

The catch is: I've only noticed this with Phobri connected (albeit sample size = 2, but I don't have it connected terribly often).

Kernel logs also seem to suggest a USB problem:

Sep 24 11:39:31 triangulum kernel: [52811.393011] xhci_hcd 0000:05:00.4: Timeout while waiting for stop endpoint com
mand
Sep 24 11:39:33 triangulum kernel: [52813.728826] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out
Sep 24 11:39:33 triangulum kernel: [52813.728867] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ER
ROR* [CRTC:67:crtc-0] commit wait timed out
Sep 24 11:39:33 triangulum kernel: [52813.728939] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR
* [CRTC:67:crtc-0] flip_done timed out
Sep 24 11:39:34 triangulum kernel: [52814.241059] iwlwifi 0000:04:00.0: Queue 10 is active on fifo 1 and stuck for 1
0000 ms. SW [236, 23] HW [23, 23] FH TRB=0x0c010a016
Sep 24 11:39:34 triangulum kernel: [52814.272837] [drm] Fence fallback timer expired on ring gfx
Sep 24 11:39:42 triangulum kernel: [52821.920826] xhci_hcd 0000:05:00.4: xHCI host not responding to stop endpoint command.
Sep 24 11:39:42 triangulum kernel: [52821.920832] xhci_hcd 0000:05:00.4: USBSTS: 0x00000018 EINT PCD
Sep 24 11:39:42 triangulum kernel: [52821.924815] xhci_hcd 0000:05:00.4: xHCI host controller not responding, assume dead
Sep 24 11:39:42 triangulum kernel: [52821.924815] xhci_hcd 0000:05:00.4: HC died; cleaning up
Sep 24 11:39:42 triangulum kernel: [52821.941098] usb 3-1: USB disconnect, device number 2
Sep 24 11:39:42 triangulum kernel: [52821.949109] usb 3-2: USB disconnect, device number 3
Sep 24 11:39:42 triangulum kernel: [52822.560845] [drm] Fence fallback timer expired on ring gfx
Sep 24 11:39:44 triangulum kernel: [52823.968926] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out
Sep 24 11:39:44 triangulum kernel: [52823.968966] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:55:plane-3] commit wait timed out
Sep 24 11:39:44 triangulum kernel: [52824.340554] watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [colord-sane:53926]

I will note I am having other problems with USB. Certain mouses randomly don't work or behave very strangely. The USB controller in my system could be fucked, or perhaps the kernel driver is too.

[panther03]

Noticed this happening with the N64 Remapper as well. There's a good chance it's something in the firmware, but the low-level USB code hasn't been changed in a long time, before I never noticed this happening - so I am also entertaining the fact that my laptop is just screwed.