Ttyjfyk

I just bought a new laptop, a Lenovo IdeaPad U330 touch, and after some struggle (with the Secure Boot stupidity) I have managed to install Arch Linux. I have configured my system, installed all the drivers (I think), but
I have a problem with my wireless disconnecting from the network.

I have noticed that my dmesg is being spammed with the

ideapad_laptop: Unknown event: 1

Also, somewhere in the flood of all those messages, there appears

mce: [Hardware Error]: Machine check events logged

but searching for the latter, there was a known bug and it's supposed to be fixed in the 3.14 version of the kernel.

I don't know if those messages are related to my wireless issues but I thought they might be relevant. I'm pasting the last few lines of dmesg with wireless reconnecting:

[ 2513.577794] ideapad_laptop: Unknown event: 1
[ 2534.762183] ideapad_laptop: Unknown event: 1
[ 2555.958244] ideapad_laptop: Unknown event: 1
[ 2577.159613] ideapad_laptop: Unknown event: 1
[ 2580.083918] cfg80211: Calling CRDA to update world regulatory domain
[ 2580.918208] wlp2s0: authenticate with 10:fe:ed:65:58:c0
[ 2580.920015] wlp2s0: send auth to 10:fe:ed:65:58:c0 (try 1/3)
[ 2580.924404] wlp2s0: authenticated
[ 2580.931245] wlp2s0: associate with 10:fe:ed:65:58:c0 (try 1/3)
[ 2580.957371] wlp2s0: RX AssocResp from 10:fe:ed:65:58:c0 (capab=0x431 status=0 aid=10)
[ 2580.968632] wlp2s0: associated
[ 2598.361115] ideapad_laptop: Unknown event: 1
[ 2619.550989] ideapad_laptop: Unknown event: 1
[ 2621.534185] cfg80211: Calling CRDA to update world regulatory domain
[ 2622.369409] wlp2s0: authenticate with 10:fe:ed:65:58:c0
[ 2622.371192] wlp2s0: send auth to 10:fe:ed:65:58:c0 (try 1/3)
[ 2622.375724] wlp2s0: authenticated
[ 2622.378073] wlp2s0: associate with 10:fe:ed:65:58:c0 (try 1/3)
[ 2622.426904] wlp2s0: RX AssocResp from 10:fe:ed:65:58:c0 (capab=0x431 status=0 aid=10)
[ 2622.428139] wlp2s0: associated
[ 2624.830025] cfg80211: Calling CRDA to update world regulatory domain
[ 2625.652178] wlp2s0: authenticate with 10:fe:ed:65:58:c0
[ 2625.653835] wlp2s0: send auth to 10:fe:ed:65:58:c0 (try 1/3)
[ 2625.679633] wlp2s0: authenticated
[ 2625.680707] wlp2s0: associate with 10:fe:ed:65:58:c0 (try 1/3)
[ 2625.800834] wlp2s0: associate with 10:fe:ed:65:58:c0 (try 2/3)
[ 2625.858120] wlp2s0: RX AssocResp from 10:fe:ed:65:58:c0 (capab=0x431 status=0 aid=10)
[ 2625.874661] wlp2s0: associated
[ 2640.757569] ideapad_laptop: Unknown event: 1
[ 2661.948093] ideapad_laptop: Unknown event: 1
[ 2683.154343] ideapad_laptop: Unknown event: 1
[ 2704.340696] ideapad_laptop: Unknown event: 1

Here is also the output of iwconfig:

wlp2s0 IEEE 802.11bgn ESSID:"Krizred2" 
 Mode:Managed Frequency:2.427 GHz Access Point: 10:FE:ED:65:58:C0 
 Bit Rate=90 Mb/s Tx-Power=16 dBm 
 Retry long limit:7 RTS thr:off Fragment thr:off
 Power Management:on
 Link Quality=54/70 Signal level=-56 dBm 
 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
 Tx excessive retries:380 Invalid misc:627 Missed beacon:0

lo no wireless extensions.

and lspci | grep Net:

02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)

Kernel: Linux 3.13.6-1-ARCH

EDIT

Just now I noticed this, while trying to update my system, just in case, since I don't have much to lose. I tried to update my system with providing network connection with USB tethering over my mobile phone.

There I noticed that my phone gets disconnecting in a similar way than my wifi! Even with USB tethering turned off. I also tried with an USB flash key, but that seems to be working.

You require to compile your own custom-kernel from the Vanilla tree to acquire that patch.

Arch Linux First-Time Custom Kernel Guide

The issue with distribution-kernels is that you do not receive the benefit of the bleeding-edge tree available on Kernel.org.

The most daunting task here is to set your Kernel Flags. You also require a compiler toolchain (GCC). Your distribution, Arch, should have packages available to install for developers. When you meet that prerequisite, you will want to compile for your system.

If you have any questions about which flags you are requiring to enable, refer to the database at LKDB:

Linux Kernel Driver Database

You need to discover what hardware in your system is supported by which kernel drivers.

If your phone also shows the same symptoms, it is a very strong indication that your WiFi setup is flaky, and your machine (and phone) are probably fine.

Go to the nearest WiFi hotspot (Starbucks works fine ;-) and try there.