Change wireless interface "sens" value how?

[JD]

On Sat, Feb 12, 2011 at 1:59 PM, mike cloaked <mike.cloaked at gmail.com>wrote:

> On Sat, Feb 12, 2011 at 6:09 PM, JD <jd1008 at gmail.com> wrote:
> > On 02/12/2011 07:48 AM, mike cloaked wrote:
> >> On Sat, Feb 12, 2011 at 3:30 PM, mike cloaked<mike.cloaked at gmail.com>
>  wrote:
> >>
> >>> I tested a different laptop with different wireless card:
> >>>
> >>> 03:03.0 Network controller: Intel Corporation PRO/Wireless 2200BG
> >>> [Calexico2] Network Connection (rev 05)
> >>>
> >>> [root at lapmike2 ~]# lsmod|grep ipw
> >>> ipw2200               116546  0
> >>> libipw                 21037  1 ipw2200
> >>> cfg80211              110951  2 ipw2200,libipw
> >>> lib80211                4107  3 lib80211_crypt_ccmp,ipw2200,libipw
> >>>
> >>> For that laptop I can change the value of sens!
> >>>
> >> This driver seems to refuse sens values in dBm - but only as positive
> >> numbers - so I am unsure what the appropriate value is in this case -
> >> but it seems that if the wireless driver is able to change the sens
> >> value and it can be set in dBm then your advice is good - however I
> >> did not realise there was so much variation in support on the driver
> >> side and this whole issue is a lot more complicated than I first
> >> realised!
> >>
> > I am also plagued by the same problem for rt2xxx driver.
> > So I opened a bug:
> > https://bugzilla.kernel.org/show_bug.cgi?id=28972
> > You might want to add your comment to this bug and report
> > your device and loaded wireless drivers.
>
> I am unsure if the responsibility for drivers is directly kernel?  Or
> is there an upstream driver devel list for each of the drivers
> separately? For example in my case the ath5k driver does not support
> the sens parameter but the ipw2200 driver on another laptop I use does
> support it but not measured in dBm but a positive integer - so it is
> quite hard to know what those numbers mean in terms of the signal
> level. It seems that there is wide variation in the way the drivers
> were written and minimal documentation about this in an easy to access
> form. Certainly you seem to have to chase up info and spend time doing
> the research!
>
> I have been getting help from the networkmanager upstream list but in
> the end it looks like it is necessary to get onto whichever upstream
> list corresponds to the driver for your hardware - and I have a
> collection of different chipsets all having different drivers
> (ipw2200, iwl3945, iwl4965, ath5k, rtl8712 which is also supported by
> 8912 etc)
>
> So I think I will have to do some looking up on which the relevant
> upstream list should be in each case - I guess in your case it will be
> the list for the Realtek driver which is of course not full gpl! There
> is an 8912 driver which is in the kmod staging tree but is not in the
> mainstream kernel - though can be loaded via rpmfusion - not sure if
> this will drive your device though?
>
> Certainly there is lots to learn for sure!
> --
> mike c
>

Actually, my chipset is the RalinkTech RT2860, which is now supported
by mainline (AFAIK). It seems serialmonkey no longer maintains this
driver???

At any rate, I have had other issues with the rt2xxx driver re: setting the
Tx power.
After I opened a bug at bugzilla.kernel.org, I received a patch which took
care
of the problem.

So, I am hoping that they will pay attention to this and provide a patch.

Cheers,

JD
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