Re: Poor wifi performance on Intel 7260 Dual-Band AC Wifi card

[Larry Finger <Larry.Finger@lwfinger.net>]

On 07/29/2014 02:28 AM, Borislav Boev wrote:
> Hello, I am reporting this bug, though it is well known for years. In general I've experienced poor wifi performance with all Intel cards, starting from 3945abg, 4965agn and now Intel 7260 Dual-Band AC.
> The old cards were on a ThinkPad T61 system, 7260 is on a brand new ThinkPad Edge E540.
> 
> So here's the problem:
> Wireless conection is slow, there's a unusual ping while browsing web pages (tried with all browsers - no luck), and sometimes drop-outs in connection.
> There's a partial fix by disabling Wireless "N" mode, but this is irrational, because it limits the network to only 54mbits speed.
> 
> Details about the system:
> Hardware:
> ThinkPad E540
> CPU: Intel core i5-4200m (Haswell)
> Wireless adapter: Intel 7260 Dual-Band AC
> 
> Software:
> PCLinuxOS 2014.07
> Kernel: 3.15.5 (though it was the same with old kernels)
> Kernel module: iwlwifi 

You should try the experimental firmware file from
https://git.kernel.org/cgit/linux/kernel/git/egrumbach/linux-firmware.git/plain/iwlwifi-7260-9.ucode?h=Core6.

I am currently testing it and getting throughput of 60 Mbps on the 2.4 GHz band,
and 90 Mbps at 5 GHz.

Larry