this is an attempt to find the cause of https://bugs.freedesktop.org/show_bug.cgi?id=97813 at the kernel level.
if this is not pertinent, please close this bug
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Summary:

I own a ThinkPad X1 Wireless Touch Mouse (http://shop.lenovo.com/us/en/itemdetails/4X30K40903/460/0E80436C80A748E6AA76791FC42C9CA3)
While connected through the provided usb dongle, the mouse works flawlessly,
but while connected through USB, the mouse is really sluggish.
After investigations, it has been found that, while connected through bluetooth, events are received from the mouse every 70ms exactly, explaining the slow move.

I was wondering if this could be a driver issue?
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hardware informations
- computer: Thinkpad X1 carbon 4th gen (type 20FB)
- OS: arch linux
- kernel: Linux R2D2-X1 4.9.11-1-ARCH #1 SMP PREEMPT Sun Feb 19 13:45:52 UTC 2017 x86_64 GNU/Linux
- lspci -v output:
  04:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
	Subsystem: Intel Corporation Device 0130
	Flags: bus master, fast devsel, latency 0, IRQ 133
	Memory at e1100000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number XXX
	Capabilities: [14c] Latency Tolerance Reporting
	Capabilities: [154] L1 PM Substates
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi