On Sat, 2010-04-24 at 00:10 -0300, Henrique de Moraes Holschuh wrote: > On Fri, 23 Apr 2010, Jerone Young wrote: > > > Depends on how the key behaves. Does the EC change from mute always > > > mutes (and vol up/down unmutes) mode to mute does nothing (and thus you > > > can dumb it down into a toggle) depending on OSI(Linux) ? > > > > Yeap. So by setting OSI=Linux, the EC basically just makes the mute > > button an OS key press. The OS then mutes from the driver or higher > > level. This way both speakers & headphone jack get muted. > > Ok. Please tell me which bit of the EC the BIOS touches to change modes > since you did look at its innards. That will let me detect the current mode > from inside thinkpad-acpi... Not sure, this is based on the DSDT from my x301.. but here are the instructions: \_SB.PCI0.LPC.EC.SAUM (0x02) Actually this is identical to the condition found in an X61 (which is already in blacklist.c): http://www.mail-archive.com/linux-acpi@xxxxxxxxxxxxxxx/msg12070.html > > > Well the T410 has interesting behavior. It actually does both at the > > same time. It sends the OS the mute key press & does a hardware mute to > > the speakers. This can fall out of sync of course if a user mutes from > > the userspace applet. But is easily remedied once the user presses the > > up or down volume key. > > Argh. > > > Given some of the new behavior it's probably best to crap it. I did some > > testing though before on this on the acpi-devel mailing list with my > > X301. I want to send the OSI patch for that as well. But the X300 & the > > X301 have the nice hardware mute light that some people love. So I will > > just have to add the command line for my machine for a while. > > I'd rather find out exactly how to sync things. Chances are very high the > hardware mute gate powers *off* the speaker drivers (as it does on all > thinkpads with the extra hardware speaker/headphone volume control). I belive at least under Windows they use a daemon to keep things in sync. I think with a vanilla Windows install it has the same sync issue. You have to have a userspace daemon monitoring the two. *Going off vague memory .. so take it with little confidence till can get a chance to really verify. Jerone > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
