Hello,
thank you for your response. I attach the full syslog since the last
boot which contains some disconnects. I enabled debug mode for
wpa_supplicant with -dd option (let me know if you need anything else).

I also tried connecting directly, i.e. without NetworkManager but
manually with wpa_supplicant and I still get disconnects, howvever
wpa_supplicant gives different logs with different drivers. Please, see
the file wifi.log (you can see there the driver i used in
wpa_supplicant, that log doesn't have the debug activated but let me
know if you need that too)

Thank you again,
Nick.

On 25.05.2015 14:33, Emmanuel Grumbach wrote:
> On Sat, May 23, 2015 at 1:28 PM, Nick Dimov <dimovnike@gmail.com> wrote:
>> Hello,
>> I recently bought the Intel 7260 AC wifi card (below is the PCI info)
>> and the card works perfectly in windows with the latest intel driver but
>> in linux I get deauthenticating and disconnects (reason -3) every minute
>> or so. When these disconnects happen I get packet loss. In the attached
>> file iwlwifi_dmesg.txt you can see the log that is produced each time a
>> disconnect happens. I also tried connecting on 2.4Ghz but I get the same
>> packet loss. I also put the last firmware from
>> http://git.kernel.org/?p=linux/kernel/git/firmware/linux-firmware.git
>> but it did not help.
> Please increase the debug level of the supplicant. And attach the full syslog.
>
>> There is also another problem: In windows i can see it connecting on
>> 860mbps, but on linux it never goes higher than 600mbps (i check this
>> with iwconfig) and it stays somewhere on 500mbps.
>>
>> Can you please help me solve this?
>> Thank you.
>>
>> uname -a
>> Linux nick-laptop 3.19.0-18-generic #18-Ubuntu SMP Tue May 19 18:31:35
>> UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>>
>> lspci info:
>> 03:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)
>>         Subsystem: Intel Corporation Dual Band Wireless-AC 7260
>>         Flags: bus master, fast devsel, latency 0, IRQ 29
>>         Memory at f7200000 (64-bit, non-prefetchable) [size=8K]
>>         Capabilities: [c8] Power Management version 3
>>         Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>         Capabilities: [40] Express Endpoint, MSI 00
>>         Capabilities: [100] Advanced Error Reporting
>>         Capabilities: [140] Device Serial Number d8-fc-93-ff-ff-e4-70-d7
>>         Capabilities: [14c] Latency Tolerance Reporting
>>         Capabilities: [154] Vendor Specific Information: ID=cafe Rev=1
>> Len=014 <?>
>>         Kernel driver in use: iwlwifi
>>