RFC: Possible fix for wireless issue / Power consumption?

Nelson Castillo arhuaco at freaks-unidos.net
Wed Jul 1 23:21:16 CEST 2009

budfive has submitted a fix for the wireless issue.


"One obvious potential downside with this is that since we're no longer
cleaning up at "ifconfig down", an inactive driver can still use power
needlessly. I did some tests, and while I do see this extra power usage, it
looks like it's inconsequential".

*** ar6000_close castrated
   | phone off doing nothing                      | 101mA |
   | insmod ar6000.ko                             | 103mA |
   | ifconfig eth0 up                             | 103mA |
   | ifconfig eth0 down                           | 103mA |
   | connect (ifconfig up, iwconfig, udhcpc, etc) | 105mA |
   | ifconfig eth0 down                           | 105mA |
   | rmmod                                        | 100mA |

*** ar6000_close unmodified
   | ifconfig eth0 up                             | 103mA |
   | ifconfig eth0 down                           | 102mA |
   | rmmod                                        | 101mA |
   | unbind                                       | 96mA  |

Timo(lindi-) has confirmed that this patch works well for him.

Is there a reason for not having this fix in the latest OM kernel?

It seems this is an important issue that has delayed the adoption of
the latest kernel by many users.

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