Why does the WiFi adapter keep getting lost?

Question

WiFi

Lenovo G770 laptop , native operating system, I have been using it for two and a half years. Not so long ago, problems began with the WiFi adapter: it disconnects from the router, stops seeing it in the list of devices, but sees everything else, although it cannot connect to them either. Then the WiFi adapter began to disappear altogether, as if the board was disconnected from the PC. He treated me with long tedious reboots and clicking the radio button on / off the wireless module. At some point it stopped helping.
I sinned on the hardware component, but no, the Slackware installed in the dual-boot always sees the WiFi adapter (although I could not connect the Internet via Linux, but this is because my hands are crooked).
I began to sin on the drivers (they were from the DriverPack Solution 2013 package, it seems, for a year), deleted them, Windows picked itself up, found something somewhere, installed it. It worked for about an hour, then it began to fall off again. I installed the drivers offered by Windows again, googled a disk with native drivers for a laptop on the Internet, began to download, and noticed an interesting feature: WiFi falls off only at high load. Those. I set the download speed limit to ~ 900 kb / s and everything was fine (checked with ping -t 8.8.8.8
I tried to install the drivers from the new DRPS package, but it installed the drivers for the Realtek card, although I have Atheros (at least these drivers are installed by Windows itself) and the adapter did not work at all.
), raised the limit to 1500 kb / s - the adapter was lost, but after a minute and a half it was picked up again by itself.
As a result, I installed the native WiFi driver that was on the downloaded disk, I didn’t see any problems for a little more than a day, and then spontaneous shutdowns started again, as at the very beginning. Cured by another reinstallation of native drivers.
And yet, what is it, why does it happen, and how to live with it (do not reinstall the same drivers every other day)?

Answer 1

IMHO it's a hardware problem. You yourself write that the adapter falls under load, but in Linux you could not raise the Internet - i.e. give a load. Accordingly, the test on Linux is not counted. Try to put a second Windows next to it, not Linux, feed it native drivers from the manufacturer's website and test it with some kind of torrent.
There is a slight suspicion of overheating of the adapter itself. Try to check it like this - give the load to the laptop (start the crisis), and follow the behavior of the adapter under the general load, but with the Internet unloaded.

Answer 2

Download livecd ubuntu 14.10, you don't need much skill to set up wifi. And test it.

Answer 3

I join GavriKos - the problem is hardware. Replace the WiFi module - inexpensively, you can do it yourself, you can in any service.
In the same way, I had a buggy Zuchel WiFi adapter in my old laptop after two years of trouble-free operation. With warming up, the speed dropped, then WiFi fell off completely.