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Thread: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

  1. #1

    Default Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    Hi!

    I'm trying to get my Dell Latitude work with wifi speed >54Mbit/s, and up to now without any success. The router is a Dlink DIR-635, it has 'n' enabled and working (got an apple laptop connecting at 130Mbit/s, can't test the actual throughput though, since it's the only high-speed device).

    Here's the device data:
    0c:00.0 Network controller: Intel Corporation WiFi Link 5100
    Subsystem: Intel Corporation WiFi Link 5100 AGN
    Flags: bus master, fast devsel, latency 0, IRQ 43
    Memory at f1ffe000 (64-bit, non-prefetchable) [size=8K]
    Capabilities: [c8] Power Management version 3
    Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [e0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Device Serial Number 00-24-d6-ff-ff-8e-01-28
    Kernel driver in use: iwlagn
    I'm running 11.4, added the compat-wireless recently to be able to run the newes firmware (iwlwifi-5000-5.ucode , firmware version 8.83.5.1 build 33692), but still all I get is 54Mbit/s. I'd like to know if ANYONE ever got the 802.11n speed on linux, and in particular with these intel cards.

    Thanks!

  2. #2

    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    SOLVED!

    Was my own fault, apparently (and you won't read it anywhere), WEP encryption doesn't allow 11n speeds. Switched to WPA and all runs fine!

  3. #3
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    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    Its interesting you have had success here with the 5100 AGN. A number of users have reported constant drop outs (requiring a reboot each time) with the 5100/5300 AGNs. I experienced same with 11.4 KDE liveCD with a 5300AGN, but I did not have problems with an 11.4 Gnome liveCD with same 5300 AGN.

    May I ask what desktop you are using ? Gnome ? KDE4 ?

    I'm also wondering if this is related to the "firmware version 8.83.5.1 build 33692" that you noted in your post. May I ask where you obtained that firmware from ? ( oldcpu being hopeful that the final long awaited firmware update to fix the drop outs that many have experienced has finally arrived ).

  4. #4

    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    Quote Originally Posted by oldcpu View Post
    Its interesting you have had success here with the 5100 AGN. A number of users have reported constant drop outs (requiring a reboot each time) with the 5100/5300 AGNs. I experienced same with 11.4 KDE liveCD with a 5300AGN, but I did not have problems with an 11.4 Gnome liveCD with same 5300 AGN.
    Mine is a Dell Latitude E6400 with Intel 5100AGN.

    Quote Originally Posted by oldcpu View Post
    May I ask what desktop you are using ? Gnome ? KDE4 ?
    It's KDE4, the official 4.6 coming with 11.4 (I stopped using Gnome few years ago, when after each upgrade the whole desktop was getting messed up).

    Quote Originally Posted by oldcpu View Post
    I'm also wondering if this is related to the "firmware version 8.83.5.1 build 33692" that you noted in your post. May I ask where you obtained that firmware from ? ( oldcpu being hopeful that the final long awaited firmware update to fix the drop outs that many have experienced has finally arrived ).
    I downloaded the firmware from http://intellinuxwireless.org/iwlwif...8.83.5.1-1.tgz
    To load it I had to install the compat-wireless* packages from driver:wireless repository.
    In fact I can't say yet that I have no dropouts since I managed to make the 11n speeds working only last night and don't have enough experience yet. What I can say for sure is that at 11g (54Mbit/s) speed things worked fine, very rarely I had problems with knetworkmanager, and had to switch to Gnome nm-applet instead (which stopped working for me since last update). Frankly speaking, all the development in network manager applets sucks, it only got worse and worse since kde3. But this is an offtop probably

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    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    Quote Originally Posted by dich View Post
    I downloaded the firmware from http://intellinuxwireless.org/iwlwif...8.83.5.1-1.tgz
    To load it I had to install the compat-wireless* packages from driver:wireless repository.
    Thanks for the link. I note this for historical updates to the firmware with there being an update 9 days ago !
    Code:
     
    5000 Images - for Intel Wireless WiFi 5100AGN, 5300AGN, and 5350AGN
    iwlwifi-5000-ucode-8.83.5.1-1.tgz 04-20-11 12:08:15  R L 
    iwlwifi-5000-ucode-8.24.2.12.tgz 05-19-09 14:37:59   R L 
    iwlwifi-5000-ucode-5.4.A.11.tar.gz 06-10-08 19:46:21 R L
    I'm not at a Linux PC currently. When I get home I will have to download that tarball and see if there is a release note inside which explains the changes.

  6. #6

    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    There's no changelog, unfortunately, only a useless readme and license...
    BTW, I seem to have the dropouts, too. But for a short time only, no reboot required. Once I had to run rcnetwork restart to get things back...

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    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    Quote Originally Posted by dich View Post
    There's no changelog, unfortunately, only a useless readme and license...
    BTW, I seem to have the dropouts, too. But for a short time only, no reboot required. Once I had to run rcnetwork restart to get things back...
    I found a bug report on this (bug 16691) and it appears the 8.83.5.1 has helped a bit, but not completely:
    Bug 16691 – IPW5100: iwlagn broken with 2.6.34.x to 2.6.35.2 update

    For example this quote from that Bug 16691 report:
    Quote Originally Posted by Craig G on 2011-01-17: #46
    I've tested the experimental firmware (iwlwifi-5000-exp-8.83.5.1) with a 5300 card and kernel 2.6.36.2. Initially it seems to have solved the problem. iwconfig reported bit rate maxes out at 300 Mb/s (though it drops to 6 Mb/s during inactivity). File transfer rates are significantly greater than they were with N disabled. There are quite a few of the following messages in the syslog, but that may be expected given the kernel debugging options necessary in order to run the experimental firmware.
    Code:
    iwlagn 0000:03:00.0: Aggregation not enabled for tid 0 because load = 1
    iwlagn 0000:03:00.0: iwlagn_tx_agg_start on ra = xx:xx:xx:xx:xx:xx tid = 0
    iwlagn 0000:03:00.0: Aggregation not enabled for tid 0 because load = 2
    iwlagn 0000:03:00.0: iwlagn_tx_agg_start on ra = xx:xx:xx:xx:xx:xx tid = 0
    iwlagn 0000:03:00.0: iwlagn_tx_agg_start on ra = xx:xx:xx:xx:xx:xx tid = 0
    However, after about 10 minutes of inactivity, the connection becomes inoperable. Reloading the module fixes the problem temporarily, but it hasn't held a connection for more than 15 minutes at a time. This is significantly longer than without the experimental firmware, but it doesn't seem to have completely fixed the problem
    I'm fortunate I don't have the Intel WiFi drop out problem on openSUSE-11.3 KDE, but because I did experience the drop out problem on openSUSE-11.4 KDE (on my Dell Studio 1537 laptop with the Intel WiFi 5300AGN) during liveCD testing, I have not installed 11.4 on that laptop.

    From my read now, it appears I can't expect 8.83.5.1 to solve the connection problems (although I'm also not convinced the 11.4 KDE connection problems were the Wifi device - as I had no such problems with 11.4 Gnome liveCD - and ergo 11-4 Gnome is an option for me to install on this laptop to replace 11.3 KDE if this problem is not fixed within 8-months or so (when openSUSE-11.3 support stops)).

  8. #8

    Default Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    15 minutes?! I'm having dropout problems perhaps once in a week! With the 11n upgrade I'll have to see though, but I surely run hours without problems...

  9. #9

    Default Απ: Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    I have started experiencing dropouts with a ralink card since 11.4
    But have no issues with ath9k at same location.

    It could be unrelated to the network card, definately needs looking into / filing a bug report

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    Default Re: Απ: Re: Intel WiFi Link 5100 with 802.11n (aka 300Mbit/s)

    Just to re-iterate, bug https://bugzilla.novell.com/show_bug.cgi?id=675433 was written on openSUSE-11.4 drop outs with the Intel WiFi Link 5100. I noted on the bug report that with the Gnome liveCD for openSUSE-11.4 that I obtained no drop outs with Gnome, but I did experience drop outs with KDE liveCD for openSUSE-11.4.

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