Isn't Wifi supposed to be off by default?

Andy Green andy at
Wed Jan 14 15:24:25 CET 2009

Hash: SHA1

Somebody in the thread at some point said:
| Andy Green wrote:
|> Yeah I remember the things about erratic interrupts, I didn't realize
|> that we worked around that now by polling in a loop that includes the
|> whole SDIO thing at 100Hz.
| It's not even our own workaround - it's just what the SDIO stack does
| when a driver doesn't support "real" interrupts.
| drivers/mmc/core/sdio_irq.c:sdio_irq_thread is actually pretty clever
| and tries to predict when interrupts are likely to happen, so it polls
| more often when there's activity, then gently slows down again.

Well, it's clear we need to keep WLAN disabled by default and avoid this
penalty routinely, the modularization should help but the rfkill + power
reduction thing replacing existing alleged power control stuff is also
really needed if we didn't know that already.

Module removal should also enforce lowest power mode if it isn't already
too I guess.

And at least it doesn't impact suspend current since it can't be doing
that then.

- -Andy
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