Valve Index no longer tracks properly.

[OldManRacer]

Controllers seem fine but the headset view keeps flashing to gray on a consistent 1s interval and then it just shuts down... I attempted to debug to see if one or more of the IR sensors were out and it looks like I may have a cable issue? The packet latency is horrible and changing ports does not seem to help.

Lighthouse Optical HID opened
Attempting HID Open VrController: LHR-30591599
Lighthouse VrController HID opened
LHR-30591599: Triggered keepalive (succeeded)
LHR-30591599: Packet received after 0.988s, keepalive (0/1)
LHR-30591599: Triggered keepalive (failed)
LHR-30591599: Triggered keepalive (succeeded)
LHR-30591599: Packet received after 0.957s, keepalive (4/1)
LHR-30591599: Triggered keepalive (failed)
LHR-30591599: Triggered keepalive (succeeded)
LHR-30591599: Packet received after 1.000s, keepalive (2/1)
LHR-30591599: Triggered keepalive (failed)
LHR-30591599: Triggered keepalive (succeeded)
LHR-30591599: Packet received after 1.012s, keepalive (10/1)
LHR-30591599: Triggered keepalive (failed)
LHR-30591599: Triggered keepalive (succeeded)
LHR-30591599: Packet received after 1.011s, keepalive (10/1)

[Bob Loblaw]

Check SteamVR support wizard https://help.steampowered.com/en/wizard/HelpWithGame/?appid=250820

Because of the 1 second interval in your case, check #4c first, then 5. RGB lighting is cancer for VR rigs.
======snip========

Prior causes of loss of tracking in the forums:
1) reflections, sunlight, (you could test base stations one at a time to track down reflections, being mindful to switch a 1.0 out of mode c for solo testing)
2) Fast movement making IMU go off scale ( https://steamcommunity.com/app/250820/discussions/0/1639793203772223815/?tscn=1621433422 )
3) haptics making IMU go off scale
4) USB issue:
4a) change port ( https://steamcommunity.com/app/250820/discussions/2/3435703754821598376/ )
4b) incompatible USB controller, get a USB card ( https://www.reddit.com/r/ValveIndex/comments/kylxvn/how_the_heck_do_i_hard_reset_the_index_controllers/gjkfxop/ ) and ( https://steamcommunity.com/app/250820/discussions/0/3723946425648297770/ ) and ( https://steamcommunity.com/app/250820/discussions/2/3802777561339351233/?tscn=1689822326 )
4c) Maybe RGB lighting app or GPU driver issue? ( https://steamcommunity.com/app/250820/discussions/2/3723946781863995120/ )
5) logitech wireless charging mouse pad ( https://www.reddit.com/r/Vive/comments/nwpafh/vive_pro_2_blanking_out_issue_solved_by/ )
6) post with info from Valve about purging superfluous crap from VR PC, resetting USB drivers, and power cycling the Index their way: ( https://steamcommunity.com/app/250820/discussions/2/3781371939903917200/ )
7) HMD cable loose connection (at PC on under HMD plug cover) or cable is wearing out
8) XMP caused it for one user ( https://steamcommunity.com/app/250820/discussions/2/3371531430932839388/ )