[regression-potential] Intel WiFi Link 5150ABG can't connect to Access Point if "802.11N-Only Mode" enabled

[RussianNeuroMancer]

I install linux-backports-modules-wireless-lucid-generic package for test another issue https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554832 with fresh driver, but found another problem. If in Access Point settings "802.11N-Only Mode" enabled Intel WiFi Link 5150AGN can't connect to AP.
If I change mode to "Mixed" or "802.11G-Only Mode" Intel WiFi Link 5150AGN can connect to AP.

[RussianNeuroMancer (russianneuromancer)]

I test this issue with this AP: Linksys 320N (DD-WRT v24-sp2 (build 14144 - 03/24/10) firmware, latest), Linksys 610N (DD-WRT v24-sp2 (build 14144 - 03/24/10) firmware, latest) and TP-LINK TL-WR941ND (090821 firmware, latest, official).

[Leann Ogasawara (leannogasawara)]

I'm removing the regression-proposed tag as this already is appropriately tagged regression-potential. Additionally there is no kernels in -proposed for Lucid so the regression-proposed tag doesn't apply here.

[Jeremy Foshee (jeremyfoshee)]

Hi RussianNeuroMancer,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

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[RussianNeuroMancer (russianneuromancer)]

Tested with 2.6.34rc5 - still an issue.

[RussianNeuroMancer (russianneuromancer)]

Also this bug is present in 2.6.33.

[RussianNeuroMancer (russianneuromancer)]

https://bugzilla.kernel.org/show_bug.cgi?id=15892

[RussianNeuroMancer (russianneuromancer)]

My problem is result of incorrect detection of WiFi adapter. My adpater is 5150ABG, but iwlagn driver from 2.6.32 kernel detect it like 5150AGN, and allow connect to 802.11N-Mode enabled networks. In 2.6.33 and 2.6.34 detection problem is fixed.