Intel wifi issue

Ztcoracat · 05-09-2015, 08:17 PM

Ok I talked to other Lenovo owners with this problem and they told me what worked for them.

They found out that Debian Jessie works out of the box with the newer wifi cards that are installed on the newer Lenovo Thinkpads.

One man found that using the Linksys WUSB54GC wifi dongel worked and helped but he had to blacklist the internal drivers adapter driver in order for the Linksys to work.

If these suggestions work please let me know.

Timothy Miller · 05-10-2015, 01:59 AM

Well, Jessie has a 3.16 kernel so it might very well have been an issue with 3.14...

aszabo · 05-10-2015, 04:50 PM

Quote:

Originally Posted by eldercitizen

See: https://bugzilla.kernel.org/show_bug.cgi?id=78341

Put "options iwlwifi 11n_disable=8" in some file in "/etc/modprobe.d" or your kernel command line.

Unfortunately the option 11n_disable=8 did not helped, the speed is still slow. The bug is concerned to Intel 6250, mine is 6205.

aszabo · 05-10-2015, 05:12 PM

Quote:

Originally Posted by eldercitizen

Check if there's a difference in module-parameters between these distributions if you still have both installed. (e.g. grep . /sys/module/iwlwifi/parameters/*). Furthermore you could check if the wpa_supplicant versions or configurations are different. What does "iwconfig" and maybe "iw dev" or "iw phy" say.
I've never used N-wireless, maybe there's something to do to enable that.

All those wireless cards should be still properly supported in the kernel. Btw. that looks like an old slackware-current kernel, try the actual current one.

iw phy0 info says:

xxxxx
Band 1:
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Band 2:
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
xxxxx

Blasfemis · 11-27-2017, 11:05 PM

This might help someone with dropped connections:
I run Mint (currently 18.3) with a TP Link 1200 T4U V1 USB wireless adapter (which in itself is a bit of a cow to get running at first but that is another story). The 2.4 GHz connection was reasonably stable, but the 5 GHz connection was very unreliable and dropped all the time.
Instead of using the default network manager in Mint, I recently loaded wicd from the repository. I found two 5 Ghz connections and I had previously only seen one (the weaker of the two, which kept dropping when dipping under 30%)). I connected, and it came up with a message about encryption. I then accepted the relevant encryption checkbox, and things have been smooth as butter ever since. So for me, switching to wicd did the trick.