On my StudioStudioStudio it's the BT keyboard. There's a lag upon initialitialinitialinitialitialinitialinitialitialinitialinitialitialinitialinitialitialinitialinitialitialinitialinitialitialinitinitialitialinitialiniitialitialinitialinitialitialinitialtialitialinitialinitialitialinitialinitialitialinitialinialitialinitialinitialitialinitialinitialitialinitialinitalitialinitialinitialitialinitialinitialitialinitialinitialitialinitial trytexttrytexttrynitialitialinitialinitialitialinitial trytexttrytexttrytei.tialitialinitialinitialitialinitial trytexttrytexttrytexttrytexttrytexttrnitialitialinitial trytexttrytexttrytexttrytexttrytexttrytexttrytexttrytext .
And sometimes it does that. The event logs are full of:
BTHUSB; The local adapter does not support an important Low Energy controller state to support peripheral mode. The minimum required supported state mask is 0x491f7fffff, got 0x1fffffff. Low Energy peripheral role functionality will not be available.
The local Bluetooth adapter has failed in an undetermined manner and will not be used. The driver has been unloaded.
Miniport Microsoft Wi-Fi Direct Virtual Adapter #2, {55b2ed95-117f-4062-a6fc-555634be6835}, had event Fatal error: The miniport has failed a power transition to operational power.
Bluetooth and wi-fi power saving are disabled on this machine. BT troubleshooting fixes it for a bit. Then itsitsitsitsitsitsitsitsitsitsitssitsitsitsitsitsitsitsititsitsitsitsitsitsitsitsitsitsitssitsitsitsitsitsitsitsititsitsitsitsitsitsitsitsitsitsitssitsitsitsitsitsitsitsititsitsitsitsitsitsitsitsitsitsitssitsitsitsitsitsitsitsit An ugly issue on a very expensive computer.