System freezes switching wireless network ON

[dentex]

System info

Entry	Details
OS	Linux Mint 19.1 Tessa
Kernel version	4.15.0-43-generic
New install	no
DKMS	no
Compiler	gcc version 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)

Devince info

Device ID:
Bus 003 Device 003: ID 0e8d:763f MediaTek Inc.
General info:

#block starts
03:00.0 Network controller: MEDIATEK Corp. MT7630e 802.11bgn Wireless Network Adapter
	Subsystem: Foxconn International, Inc. MT7630e 802.11bgn Wireless Network Adapter
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 18
	Region 0: Memory at f7900000 (32-bit, non-prefetchable) [size=1M]
	Capabilities: <access denied>
	Kernel driver in use: mt7630e
	Kernel modules: mt7630e
#block ends

Bluetooth stats:

#block starts
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
1: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no

#block ends

What didn't work?

The system completely freezes (I mean it's not recoverable in any way: no ALT+CTRL+FX to any console, or CTRL+ALT+DEL to reboot; neither works SysRq "reisub") when switching the wireless network ON. I use the network-manager, as showed in the image below (it's the blue switch).

Sometimes, with WiFi enabled, no SSID are showed for actual available networks; The "scan for networks" entry doesn't give results, so switching WiFi OFF and then ON usually refreshes the list. Here is when in many cases the system freezes.

Instead of switching the WiFi OFF and ON, I tried restarting the network manager with sudo service network-manager restart, but the effect it's the same: freeze.

What did you try?

I tried other kernels available in this Mint edition; same issue.

Error code:

[...]

Additional info

[...]

[dentex]

Working after updating the repo, I thinks thanks to the kernel >= 4.12.0 fix.
Now Wi-Fi working OK on kernel 4.18.0-17-generic.
Not bluetooth, never worked.