ath10k missing firmware/crash kernel 4.4.1

[Michal Kazior]

On 4 February 2016 at 00:24, Gerald Nunn <gnunn at gexperts.com> wrote:
> I just got a new laptop that has a killer n1525 m.2 wifi/bluetooth
> card in it and I'm not having any luck getting it going. The card is
> shown as follows in lspci:
>
> lspci -nnn|grep -i atheros
> 04:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac
> Wireless Network Adapter [168c:003e] (rev 20)
>
> When I first start the computer, dmesg shows the following and it
> looks like it can't find some firmware files?
>
[...]
> When I try to connect to a wifi network, I get the following in dmesg
> showing a firmware crash:
>
> [ 2180.498167] ath10k_pci 0000:04:00.0: firmware crashed! (uuid
> 5350ffdc-524c-4c3f-b35f-d412a5bbf84a)
> [ 2180.498174] ath10k_pci 0000:04:00.0: qca6174 hw2.1 (0x05010000,
> 0x003405ff sub 1a56:1525) fw WLAN.RM.1.1-00141 fwapi 5 bdapi 1 htt-ver
> 3.1 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1 features
> ignore-otp,no-4addr-pad
> [ 2180.498176] ath10k_pci 0000:04:00.0: debug 0 debugfs 1 tracing 0
> dfs 0 testmode 0
> [ 2180.500203] ath10k_pci 0000:04:00.0: firmware register dump:
> [ 2180.500205] ath10k_pci 0000:04:00.0: [00]: 0x05010000 0x000015B3
> 0x00939797 0x00955B31

If you look for 0x00939797 in the mailing list archive you'll find
this problem has been reported.

You're using an older firmware which advertises support for TxBF which
isn't really there. If you attempt to connect to a TxBF-capable AP the
firmware crashes.

The latest firmware
https://github.com/kvalo/ath10k-firmware/tree/master/QCA6174/hw2.1
should fix the problem.


Michał