On 09/07/2012 02:36 PM, Takashi Iwai wrote: > At Fri, 07 Sep 2012 14:17:58 +0200, > David Henningsson wrote: >> >> On 09/07/2012 01:59 PM, Takashi Iwai wrote: >>> At Fri, 07 Sep 2012 13:26:35 +0200, >>> David Henningsson wrote: >>>> >>>> On 09/07/2012 12:01 PM, Takashi Iwai wrote: >>>>> At Fri, 7 Sep 2012 07:25:44 +0200, >>>>> David Henningsson wrote: >>>>>> >>>>>> The purpose of this flag is unclear. If the problem is that some machines >>>>>> have broken misc/NO_PRESENCE bits, they should be fixed by pin fixups. >>>>>> >>>>>> In addition, this causes jack detection functionality to be flawed on >>>>>> the M31EI, where there are two jacks without jack detection (which is >>>>>> properly marked as NO_PRESENCE), but due to ignore_misc_bit, these >>>>>> jacks are instead being reported as being present but always unplugged. >>>>>> >>>>>> BugLink: https://bugs.launchpad.net/bugs/939161 >>>>>> Signed-off-by: David Henningsson <[email protected]> >>>>> >>>>> So this will fix this one case but will break some others certainly. >>>>> It's a difficult to judge, but more removal is better, so I'll take >>>>> this. >>>> >>>> Ok. Do you have a sense for how many machines that will regress due to >>>> this patch? If it is common to set all pins to the wrong value, maybe >>>> its the M31EI that is the exception. >>> >>> Maybe a few Acer and ASUS ones with old codecs. >>> Possibly some desktops with unknown mobos might hit, but that's not >>> what I do care so much for now. >> >> Hrm, ok. I still don't like the idea of regressing machines...maybe this >> patch needs further research. > > Well, let's see. I guess a problem will pop up anyway a few kernel > release later. People with such machines rarely follow the kernel > development soonish.
No, they complain on Launchpad, three months after the release or so, about how we could be stupid enough to break their systems ;-) >>>>> But I still wonder why PulseAudio cares the headphone jack state even >>>>> though this has only one output at all? >>>> >>>> When seeing the system as a whole, there can be other outputs on other >>>> cards - HDMI, USB etc. If somebody e g plugs a USB headset in it will be >>>> simpler for the user if PulseAudio does not also show the unplugged 3.5 >>>> mm jack. >>> >>> OK, but masking it out unconditionally isn't always nice. There are >>> always corner cases... >> >> Not sure what corner case you mean here, but if you like, you can >> configure this behaviour in >> /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf, >> causing the jack detection to be ignored if you prefer. And you can >> quirk a specific machine to use another .conf file based on udev rules. >> >> Or is the corner case that ALSA don't give the correct jack detection >> value? If so I prefer it to be fixed in ALSA ;-) > > Well, I can think of different cases: BIOS is broken, my hardware is > broken and the driver is broken. In such a case, an easier test would > be to disable this jack auto-things in PA, rather than fiddling with > the pin config and reconfigure the driver, so I hoped there might be > an intuitive and easy way to do that. Naah, in all those cases it is ALSA's responsibility to give a correct answer up to PA - and as such, also to provide an "intuitive and easy way" to disable jack detection if you feel there is a need. IMO. That said, it's not super difficult to comment out a few lines in /usr/share/pulseaudio/alsa-mixer/paths/*.conf, and also, most mixer UIs (e g pavucontrol) still allows you to route audio to an unavailable port. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/939161 Title: Hardware not showed in Gnome-Control-Center. - [M31EI Series, Realtek ALC861, Green Headphone Out, Rear] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/939161/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
