Re: packet loss, disconnects and possible bug in iwlwifi

[Dan Williams <dcbw@redhat.com>]

On Wed, 2015-05-27 at 08:54 -0500, Dan Williams wrote:
> On Wed, 2015-05-27 at 02:44 +0300, Nick Dimov wrote:
> > 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)
> 
> Also, make sure you stop NetworkManager when you're doing the manual
> connection.  With systemd, you need to 'systemctl mask NetworkManager'
> and then 'systemctl stop NetworkManager' to prevent it from being D-Bus
> activated too.

Or, "nmcli net off" to put NM to sleep temporarily, without messing
around with systemd.

Dan

> The reason I say this is because in your logs there are
> locally-generated disconnections, and that happens when NetworkManager
> is still running and hasn't been told to stop handling WiFi, and then
> somebody runs another wpa_supplicant alongside.
> 
> Dan
> 
> > 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
> > >>
> > 
> 
> 
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