Unable to set txpower on wifi card

[JD]

F13, latest updates.
wifi card: Sparklan wmir-200N
http://www.sparklan.com/product.php?func=view&prod_id=43
Chipset: RT2860/RT2850

The Datasheet says:

Output Power
802.11a: 12.5dBm ± 1.5dBm
802.11b: 17dBm ± 1.5dBm
802.11g: 14dBm ± 1.5dBm
802.11an: 14dBm ± 1.5dBm
802.11gn: 14dBm ± 1.5dBm

I am running in g mode (54megabits/s)

$ sudo iwconfig wlan0
wlan0     IEEE 802.11abgn  ESSID:"Deleted"
           Mode:Managed  Frequency:2.462 GHz  Access Point: 
aa:bb:cc:dd:ee:ff
           Bit Rate=54 Mb/s   Tx-Power=8 dBm <<<=====
           Retry  long limit:7   RTS thr:off   Fragment thr:off
           Encryption key:off
           Power Management:on
           Link Quality=70/70  Signal level=58 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:0

I tried to set txpower to 14 per datasheet spec:

$ sudo iwconfig wlan0 txpower 14dBm
Error for wireless request "Set Tx Power" (8B26) :
     SET failed on device wlan0 ; Invalid argument.

The drivers that are loaded for this wifi card are:

rt2800pci               7931  0
rt2800lib              27818  1 rt2800pci
rt2x00pci               5799  1 rt2800pci
rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
mac80211              182154  2 rt2x00pci,rt2x00lib
cfg80211              135626  2 rt2x00lib,mac80211
eeprom_93cx6            1305  1 rt2800pci
crc_ccitt               1311  2 rt2800pci,irda

Is this an issue with the wext driver or with the rt2XXXXX drivers?

[Terry Polzin]

On Mon, 2010-08-30 at 10:41 -0700, JD wrote:
> F13, latest updates.
> wifi card: Sparklan wmir-200N
> http://www.sparklan.com/product.php?func=view&prod_id=43
> Chipset: RT2860/RT2850
>
> The Datasheet says:
>
> Output Power
> 802.11a: 12.5dBm ± 1.5dBm
> 802.11b: 17dBm ± 1.5dBm
> 802.11g: 14dBm ± 1.5dBm
> 802.11an: 14dBm ± 1.5dBm
> 802.11gn: 14dBm ± 1.5dBm
>
> I am running in g mode (54megabits/s)
>
> $ sudo iwconfig wlan0
> wlan0     IEEE 802.11abgn  ESSID:"Deleted"
>            Mode:Managed  Frequency:2.462 GHz  Access Point: 
> aa:bb:cc:dd:ee:ff
>            Bit Rate=54 Mb/s   Tx-Power=8 dBm <<<=====
>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>            Encryption key:off
>            Power Management:on
>            Link Quality=70/70  Signal level=58 dBm
>            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>            Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> I tried to set txpower to 14 per datasheet spec:
>
> $ sudo iwconfig wlan0 txpower 14dBm
> Error for wireless request "Set Tx Power" (8B26) :
>      SET failed on device wlan0 ; Invalid argument.
>
> The drivers that are loaded for this wifi card are:
>
> rt2800pci               7931  0
> rt2800lib              27818  1 rt2800pci
> rt2x00pci               5799  1 rt2800pci
> rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> mac80211              182154  2 rt2x00pci,rt2x00lib
> cfg80211              135626  2 rt2x00lib,mac80211
> eeprom_93cx6            1305  1 rt2800pci
> crc_ccitt               1311  2 rt2800pci,irda
>
> Is this an issue with the wext driver or with the rt2XXXXX drivers?

Just for giggles, try the command as root, not sudoed from your mortal
account.

[JD]

On 08/30/2010 11:00 AM, Terry Polzin wrote:
> On Mon, 2010-08-30 at 10:41 -0700, JD wrote:
> > F13, latest updates.
> > wifi card: Sparklan wmir-200N
> > http://www.sparklan.com/product.php?func=view&prod_id=43
> > Chipset: RT2860/RT2850
> >
> > The Datasheet says:
> >
> > Output Power
> > 802.11a: 12.5dBm ± 1.5dBm
> > 802.11b: 17dBm ± 1.5dBm
> > 802.11g: 14dBm ± 1.5dBm
> > 802.11an: 14dBm ± 1.5dBm
> > 802.11gn: 14dBm ± 1.5dBm
> >
> > I am running in g mode (54megabits/s)
> >
> > $ sudo iwconfig wlan0
> > wlan0     IEEE 802.11abgn  ESSID:"Deleted"
> >             Mode:Managed  Frequency:2.462 GHz  Access Point:
> > aa:bb:cc:dd:ee:ff
> >             Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
> >             Retry  long limit:7   RTS thr:off   Fragment thr:off
> >             Encryption key:off
> >             Power Management:on
> >             Link Quality=70/70  Signal level=58 dBm
> >             Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >             Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> >
> > I tried to set txpower to 14 per datasheet spec:
> >
> > $ sudo iwconfig wlan0 txpower 14dBm
> > Error for wireless request "Set Tx Power" (8B26) :
> >       SET failed on device wlan0 ; Invalid argument.
> >
> > The drivers that are loaded for this wifi card are:
> >
> > rt2800pci               7931  0
> > rt2800lib              27818  1 rt2800pci
> > rt2x00pci               5799  1 rt2800pci
> > rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> > mac80211              182154  2 rt2x00pci,rt2x00lib
> > cfg80211              135626  2 rt2x00lib,mac80211
> > eeprom_93cx6            1305  1 rt2800pci
> > crc_ccitt               1311  2 rt2800pci,irda
> >
> > Is this an issue with the wext driver or with the rt2XXXXX drivers?
>
> Just for giggles, try the command as root, not sudoed from your mortal
> account.

What makes you think that would make a difference?
sudo works just fine for everything requiring root perms.
Furthermore, the error is complaining about the argument value.

Notice that if I specify the low value of 8, the command works just fine:

$ sudo iwconfig wlan0 txpower 8dBm
$

The driver does not comply with hardware specs.

[Rick Stevens]

On 08/30/2010 10:41 AM, JD wrote:
> F13, latest updates.
> wifi card: Sparklan wmir-200N
> http://www.sparklan.com/product.php?func=view&prod_id=43
> Chipset: RT2860/RT2850
>
> The Datasheet says:
>
> Output Power
> 802.11a: 12.5dBm ± 1.5dBm
> 802.11b: 17dBm ± 1.5dBm
> 802.11g: 14dBm ± 1.5dBm
> 802.11an: 14dBm ± 1.5dBm
> 802.11gn: 14dBm ± 1.5dBm
>
> I am running in g mode (54megabits/s)
>
> $ sudo iwconfig wlan0
> wlan0     IEEE 802.11abgn  ESSID:"Deleted"
>             Mode:Managed  Frequency:2.462 GHz  Access Point:
> aa:bb:cc:dd:ee:ff
>             Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
>             Retry  long limit:7   RTS thr:off   Fragment thr:off
>             Encryption key:off
>             Power Management:on
>             Link Quality=70/70  Signal level=58 dBm
>             Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>             Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> I tried to set txpower to 14 per datasheet spec:
>
> $ sudo iwconfig wlan0 txpower 14dBm
> Error for wireless request "Set Tx Power" (8B26) :
>       SET failed on device wlan0 ; Invalid argument.
>
> The drivers that are loaded for this wifi card are:
>
> rt2800pci               7931  0
> rt2800lib              27818  1 rt2800pci
> rt2x00pci               5799  1 rt2800pci
> rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> mac80211              182154  2 rt2x00pci,rt2x00lib
> cfg80211              135626  2 rt2x00lib,mac80211
> eeprom_93cx6            1305  1 rt2800pci
> crc_ccitt               1311  2 rt2800pci,irda
>
> Is this an issue with the wext driver or with the rt2XXXXX drivers?

Try "sudo iwconfig wlan0 txpower 14".  The "dBm" is assumed by the
command.  "man iwconfig" for details.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, C2 Hosting          [e-mail] -
- AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
-                                                                    -
-           Vegetarian:  Old Indian word for "lousy hunter"          -
----------------------------------------------------------------------

[JD]

On 08/30/2010 11:32 AM, Rick Stevens wrote:
> On 08/30/2010 10:41 AM, JD wrote:
> > F13, latest updates.
> >
> > wifi card: Sparklan wmir-200N
> > http://www.sparklan.com/product.php?func=view&prod_id=43
> > Chipset: RT2860/RT2850
> >
> > The Datasheet says:
> >
> > Output Power
> > 802.11a: 12.5dBm ± 1.5dBm
> > 802.11b: 17dBm ± 1.5dBm
> > 802.11g: 14dBm ± 1.5dBm
> > 802.11an: 14dBm ± 1.5dBm
> > 802.11gn: 14dBm ± 1.5dBm
> >
> > I am running in g mode (54megabits/s)
> >
> > $ sudo iwconfig wlan0
> > wlan0     IEEE 802.11abgn  ESSID:"Deleted"
> >              Mode:Managed  Frequency:2.462 GHz  Access Point:
> > aa:bb:cc:dd:ee:ff
> >              Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
> >              Retry  long limit:7   RTS thr:off   Fragment thr:off
> >              Encryption key:off
> >              Power Management:on
> >              Link Quality=70/70  Signal level=58 dBm
> >              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> >
> > I tried to set txpower to 14 per datasheet spec:
> >
> > $ sudo iwconfig wlan0 txpower 14dBm
> > Error for wireless request "Set Tx Power" (8B26) :
> >        SET failed on device wlan0 ; Invalid argument.
> >
> > The drivers that are loaded for this wifi card are:
> >
> > rt2800pci               7931  0
> > rt2800lib              27818  1 rt2800pci
> > rt2x00pci               5799  1 rt2800pci
> > rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> > mac80211              182154  2 rt2x00pci,rt2x00lib
> > cfg80211              135626  2 rt2x00lib,mac80211
> > eeprom_93cx6            1305  1 rt2800pci
> > crc_ccitt               1311  2 rt2800pci,irda
> >
> > Is this an issue with the wext driver or with the rt2XXXXX drivers?
>
> Try "sudo iwconfig wlan0 txpower 14".  The "dBm" is assumed by the
> command.  "man iwconfig" for details.
> Rick Stevens, Systems Engineer, C2 Hosting          [e-mail] -
> AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
>                                                                -
>       Vegetarian:  Old Indian word for "lousy hunter"          -

Did not work :(

$ sudo iwconfig wlan0 txpower 14
Error for wireless request "Set Tx Power" (8B26) :
     SET failed on device wlan0 ; Invalid argument.

But setting it to 8 worked. So, why does it reject what the specs say is 
legit power setting?

[Terry Polzin]

On Mon, 2010-08-30 at 11:45 -0700, JD wrote:
> On 08/30/2010 11:32 AM, Rick Stevens wrote:
> > On 08/30/2010 10:41 AM, JD wrote:
> > > F13, latest updates.
> > >
> > > wifi card: Sparklan wmir-200N
> > > http://www.sparklan.com/product.php?func=view&prod_id=43
> > > Chipset: RT2860/RT2850
> > >
> > > The Datasheet says:
> > >
> > > Output Power
> > > 802.11a: 12.5dBm ± 1.5dBm
> > > 802.11b: 17dBm ± 1.5dBm
> > > 802.11g: 14dBm ± 1.5dBm
> > > 802.11an: 14dBm ± 1.5dBm
> > > 802.11gn: 14dBm ± 1.5dBm
> > >
> > > I am running in g mode (54megabits/s)
> > >
> > > $ sudo iwconfig wlan0
> > > wlan0     IEEE 802.11abgn  ESSID:"Deleted"
> > >              Mode:Managed  Frequency:2.462 GHz  Access Point:
> > > aa:bb:cc:dd:ee:ff
> > >              Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
> > >              Retry  long limit:7   RTS thr:off   Fragment thr:off
> > >              Encryption key:off
> > >              Power Management:on
> > >              Link Quality=70/70  Signal level=58 dBm
> > >              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> > >              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> > >
> > > I tried to set txpower to 14 per datasheet spec:
> > >
> > > $ sudo iwconfig wlan0 txpower 14dBm
> > > Error for wireless request "Set Tx Power" (8B26) :
> > >        SET failed on device wlan0 ; Invalid argument.
> > >
> > > The drivers that are loaded for this wifi card are:
> > >
> > > rt2800pci               7931  0
> > > rt2800lib              27818  1 rt2800pci
> > > rt2x00pci               5799  1 rt2800pci
> > > rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> > > mac80211              182154  2 rt2x00pci,rt2x00lib
> > > cfg80211              135626  2 rt2x00lib,mac80211
> > > eeprom_93cx6            1305  1 rt2800pci
> > > crc_ccitt               1311  2 rt2800pci,irda
> > >
> > > Is this an issue with the wext driver or with the rt2XXXXX drivers?
> >
> > Try "sudo iwconfig wlan0 txpower 14".  The "dBm" is assumed by the
> > command.  "man iwconfig" for details.
> > Rick Stevens, Systems Engineer, C2 Hosting          [e-mail] -
> > AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
> >                                                                -
> >       Vegetarian:  Old Indian word for "lousy hunter"          -
>
> Did not work :(
>
> $ sudo iwconfig wlan0 txpower 14
> Error for wireless request "Set Tx Power" (8B26) :
>      SET failed on device wlan0 ; Invalid argument.
>
> But setting it to 8 worked. So, why does it reject what the specs say is 
> legit power setting?

How about 9?
Maybe they want the value in hex?

[JD]

On 08/30/2010 12:28 PM, Terry Polzin wrote:
> On Mon, 2010-08-30 at 11:45 -0700, JD wrote:
> > On 08/30/2010 11:32 AM, Rick Stevens wrote:
> > > On 08/30/2010 10:41 AM, JD wrote:
> > > >  F13, latest updates.
> > > >
> > > > wifi card: Sparklan wmir-200N
> > > > http://www.sparklan.com/product.php?func=view&prod_id=43
> > > > Chipset: RT2860/RT2850
> > > >
> > > > The Datasheet says:
> > > >
> > > > Output Power
> > > > 802.11a: 12.5dBm ± 1.5dBm
> > > > 802.11b: 17dBm ± 1.5dBm
> > > > 802.11g: 14dBm ± 1.5dBm
> > > > 802.11an: 14dBm ± 1.5dBm
> > > > 802.11gn: 14dBm ± 1.5dBm
> > > >
> > > > I am running in g mode (54megabits/s)
> > > >
> > > > $ sudo iwconfig wlan0
> > > > wlan0     IEEE 802.11abgn  ESSID:"Deleted"
> > > >               Mode:Managed  Frequency:2.462 GHz  Access Point:
> > > > aa:bb:cc:dd:ee:ff
> > > >               Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
> > > >               Retry  long limit:7   RTS thr:off   Fragment thr:off
> > > >               Encryption key:off
> > > >               Power Management:on
> > > >               Link Quality=70/70  Signal level=58 dBm
> > > >               Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> > > >               Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> > > >
> > > > I tried to set txpower to 14 per datasheet spec:
> > > >
> > > > $ sudo iwconfig wlan0 txpower 14dBm
> > > > Error for wireless request "Set Tx Power" (8B26) :
> > > >         SET failed on device wlan0 ; Invalid argument.
> > > >
> > > > The drivers that are loaded for this wifi card are:
> > > >
> > > > rt2800pci               7931  0
> > > > rt2800lib              27818  1 rt2800pci
> > > > rt2x00pci               5799  1 rt2800pci
> > > > rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> > > > mac80211              182154  2 rt2x00pci,rt2x00lib
> > > > cfg80211              135626  2 rt2x00lib,mac80211
> > > > eeprom_93cx6            1305  1 rt2800pci
> > > > crc_ccitt               1311  2 rt2800pci,irda
> > > >
> > > > Is this an issue with the wext driver or with the rt2XXXXX drivers?
> > >
> > > Try "sudo iwconfig wlan0 txpower 14".  The "dBm" is assumed by the
> > > command.  "man iwconfig" for details.
> > > Rick Stevens, Systems Engineer, C2 Hosting          [e-mail] -
> > > AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
> > >                                                                -
> > >       Vegetarian:  Old Indian word for "lousy hunter"          -
> >
> > Did not work :(
> >
> > $ sudo iwconfig wlan0 txpower 14
> > Error for wireless request "Set Tx Power" (8B26) :
> >       SET failed on device wlan0 ; Invalid argument.
> >
> > But setting it to 8 worked. So, why does it reject what the specs say is
> > legit power setting?
>
> How about 9?
> Maybe they want the value in hex?

Tried that too. Same error:

$ sudo iwconfig wlan0 txpower 9
Error for wireless request "Set Tx Power" (8B26) :
     SET failed on device wlan0 ; Invalid argument.
$ sudo iwconfig wlan0 txpower 0x9
Error for wireless request "Set Tx Power" (8B26) :
     SET failed on device wlan0 ; Invalid argument.

[JB]

JD <jd1008 <at> gmail.com> writes:
> F13, latest updates.
> wifi card: Sparklan wmir-200N
> http://www.sparklan.com/product.php?func=view&prod_id=43
> Chipset: RT2860/RT2850
>
> The Datasheet says:
>
> Output Power
> 802.11a: 12.5dBm ± 1.5dBm
> 802.11b: 17dBm ± 1.5dBm
> 802.11g: 14dBm ± 1.5dBm
> 802.11an: 14dBm ± 1.5dBm
> 802.11gn: 14dBm ± 1.5dBm
>
> I am running in g mode (54megabits/s)
>
> $ sudo iwconfig wlan0
> wlan0     IEEE 802.11abgn  ESSID:"Deleted"
>            Mode:Managed  Frequency:2.462 GHz  Access Point: 
> aa:bb:cc:dd:ee:ff
>            Bit Rate=54 Mb/s   Tx-Power=8 dBm <<<=====
>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>            Encryption key:off
>            Power Management:on
>            Link Quality=70/70  Signal level=58 dBm
>            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>            Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> I tried to set txpower to 14 per datasheet spec:
>
> $ sudo iwconfig wlan0 txpower 14dBm
> Error for wireless request "Set Tx Power" (8B26) :
>      SET failed on device wlan0 ; Invalid argument.
>
> The drivers that are loaded for this wifi card are:
>
> rt2800pci               7931  0
> rt2800lib              27818  1 rt2800pci
> rt2x00pci               5799  1 rt2800pci
> rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> mac80211              182154  2 rt2x00pci,rt2x00lib
> cfg80211              135626  2 rt2x00lib,mac80211
> eeprom_93cx6            1305  1 rt2800pci
> crc_ccitt               1311  2 rt2800pci,irda
>
> Is this an issue with the wext driver or with the rt2XXXXX drivers?

Hi,
$ man iwconfig
...
      txpower
              ...
              In  addition,  on and off enable and disable the radio, and auto
              and fixed enable and disable power control  (if  those  features
              are available).
              ...
                  iwconfig eth0 txpower auto

$ sudo iwconfig wlan0
...
           Bit Rate=54 Mb/s   Tx-Power=8 dBm <<<=====
...

The Tx-Power=8 dBm
means "fixed" power control (as opposite to "auto").
JB

[JD]

On 08/30/2010 02:22 PM, JB wrote:
> iwconfig eth0 txpower auto

Even after setting it to auto, it still remains at 8dBm:

$ iwconfig wlan0
wlan0     IEEE 802.11abgn  ESSID:"deleted"
           Mode:Managed  Frequency:2.462 GHz  Access Point: 
AA:BB:CC:DD:EE:FF
           Bit Rate=54 Mb/s   Tx-Power=8 dBm
           Retry  long limit:7   RTS thr:off   Fragment thr:off
           Power Management:on
           Link Quality=70/70  Signal level=55 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:0

[Darr]

On Monday, 30 August, 2010 @21:33 zulu, JD scribed:
> On 08/30/2010 02:22 PM, JB wrote:
> > iwconfig eth0 txpower auto
>
> Even after setting it to auto, it still remains at 8dBm:

http://lists.shmoo.com/pipermail/hostap/2008-March/017521.html
suggests the RAW_TXPOWER_SETTING parameter needs to be
defined in kernel options (then recompile) for manual setting of power 
levels to be possible.

I did not actually look up that option in kernel-doc to see if it exists in 
fedora.

[JD]

On 08/30/2010 03:31 PM, Darr wrote:
> On Monday, 30 August, 2010 @21:33 zulu, JD scribed:
> > On 08/30/2010 02:22 PM, JB wrote:
> > > iwconfig eth0 txpower auto
> >
> > Even after setting it to auto, it still remains at 8dBm:
>
> http://lists.shmoo.com/pipermail/hostap/2008-March/017521.html
> suggests the RAW_TXPOWER_SETTING parameter needs to be
> defined in kernel options (then recompile) for manual setting of power
> levels to be possible.
>
> I did not actually look up that option in kernel-doc to see if it exists in
> fedora.

Thanx for the tip.
I will follow it up.

[JD]

On 08/30/2010 03:31 PM, Darr wrote:
> On Monday, 30 August, 2010 @21:33 zulu, JD scribed:
> > On 08/30/2010 02:22 PM, JB wrote:
> > > iwconfig eth0 txpower auto
> >
> > Even after setting it to auto, it still remains at 8dBm:
>
> http://lists.shmoo.com/pipermail/hostap/2008-March/017521.html
> suggests the RAW_TXPOWER_SETTING parameter needs to be
> defined in kernel options (then recompile) for manual setting of power
> levels to be possible.
>
> I did not actually look up that option in kernel-doc to see if it exists in
> fedora.

A mainline developer provided a patch which I am now
applying to kernel 2.6.35.4 (from kernel.org).
Will know if it works after I install and reboot.
As I had posted an FYI a couple of days ago, my
wifi card (rt2860) was not fully supported until
kernel 2.6.35. None of the Fedora releases support it yet
and I am not interested in the akmods from rpmfusion.

See https://bugzilla.kernel.org/show_bug.cgi?id=17501

Unable to set txpower on wifi card - SOLVED

[JD]

A patch was submitted on Aug 25th, 2010 and integrated in 2.6.36.

Google the exact phrase "rt2x00: Fix max TX power settings"

so, it will be quiet a while before a fedora kernel package sees it.

On 08/30/2010 02:22 PM, JB wrote:
> JD<jd1008<at>  gmail.com>  writes:
> > F13, latest updates.
> > wifi card: Sparklan wmir-200N
> > http://www.sparklan.com/product.php?func=view&prod_id=43
> > Chipset: RT2860/RT2850
> >
> > The Datasheet says:
> >
> > Output Power
> > 802.11a: 12.5dBm ± 1.5dBm
> > 802.11b: 17dBm ± 1.5dBm
> > 802.11g: 14dBm ± 1.5dBm
> > 802.11an: 14dBm ± 1.5dBm
> > 802.11gn: 14dBm ± 1.5dBm
> >
> > I am running in g mode (54megabits/s)
> >
> > $ sudo iwconfig wlan0
> > wlan0     IEEE 802.11abgn  ESSID:"Deleted"
> >             Mode:Managed  Frequency:2.462 GHz  Access Point:
> > aa:bb:cc:dd:ee:ff
> >             Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
> >             Retry  long limit:7   RTS thr:off   Fragment thr:off
> >             Encryption key:off
> >             Power Management:on
> >             Link Quality=70/70  Signal level=58 dBm
> >             Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >             Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> >
> > I tried to set txpower to 14 per datasheet spec:
> >
> > $ sudo iwconfig wlan0 txpower 14dBm
> > Error for wireless request "Set Tx Power" (8B26) :
> >       SET failed on device wlan0 ; Invalid argument.
> >
> > The drivers that are loaded for this wifi card are:
> >
> > rt2800pci               7931  0
> > rt2800lib              27818  1 rt2800pci
> > rt2x00pci               5799  1 rt2800pci
> > rt2x00lib              25936  3 rt2800pci,rt2800lib,rt2x00pci
> > mac80211              182154  2 rt2x00pci,rt2x00lib
> > cfg80211              135626  2 rt2x00lib,mac80211
> > eeprom_93cx6            1305  1 rt2800pci
> > crc_ccitt               1311  2 rt2800pci,irda
> >
> > Is this an issue with the wext driver or with the rt2XXXXX drivers?
>
> Hi,
> $ man iwconfig
> ...
>        txpower
>                ...
>                In  addition,  on and off enable and disable the radio, and auto
>                and fixed enable and disable power control  (if  those  features
>                are available).
>                ...
>                    iwconfig eth0 txpower auto
>
> $ sudo iwconfig wlan0
> ...
>             Bit Rate=54 Mb/s   Tx-Power=8 dBm<<<=====
> ...
>
> The Tx-Power=8 dBm
> means "fixed" power control (as opposite to "auto").
> JB