Intel 7260 WiFi issues (thinkpad 240)
Getting disconnected often? Slow connection?
To check what is your wireless chipset:
lspci | grep Wireless. If it's an Intel 7260.
Check what firware is used:
dmesg | grep "iwlwifi .* loaded firmware version" (Don't trust
modeinfo, it's broken).
If you don't see any output, reboot. If the firmare version is 126.96.36.199, you have firmware version 8. Which is terribly buggy.
You want to use version 7. To do so, backup
/lib/firmware/iwlwifi-7260-8.ucode, and then delete it. Reboot.