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From: Richard H. <hug...@gm...> - 2007-05-21 12:48:32
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On Mon, 2007-05-21 at 09:32 -0300, Henrique de Moraes Holschuh wrote: > On Mon, 21 May 2007, Richard Hughes wrote: > > Has there been any work on implementing rfkill for thinkpad_acpi? If > > there is nobody working on this I am offering to add support into > > thinkpad_acpi this week. > > Yes, I have been talking to the rfkill people, but we had some disagreements > on how to best to it. I let it rest for a week or so to think better about > some issues they raised, and also in order not to waste too much bandwidth > from either side of the issue. > > Basically, I want a "fetch data from the hardware to know what state it is > in for real" interface. They want a "find a way to make sure the hardware > is doing what we told it to do" interface. Yes, sort of orthogonal issues. > I might even find out that we are better off not using rfkill in > thinkpad-acpi itself, and letting the bluetooth and wwan drivers process it. > We shall see. Less than ideal from a userspace POV, as I really just wanted to write one bit of glue code in HAL to get all the rfkill stuff to work. > The thinkpad ACPI interface does a lot more than just > radio-kill, it actually kills power to the *devices* themselves, AFAIK > (removes them from the USB bus, causing hotunplug events). Anyone with a > bluetooth and WWAN device, please speak up. Yes, so understand. The latter is very important from a powersave point of view, and I can understand how disconnecting from the bus would nuke the device, and not allow you to turn on the device with the rfkill interface. I did not think of this. > So far, what I got is that rfkill is all about handling "please disable > radios" system-wide events, and not about providing drivers with a standard > sysfs interface to enable/disable radio functionality. At least for now. Yes, agreed. For the moment I can bodge it, and just use an addon for HAL, but I'm guessing other hardware has this issue, and we should probably fix this the right way. Richard. |
