At Wed, 7 Nov 2012 09:22:33 +0100, David Henningsson wrote: > > On some of the PantherPoint HDMI machines we currently enable, we're seeing > trouble with unsol events, i e detecting monitor presence, especially when > on battery and after suspend/resume. > > BugLink: https://bugs.launchpad.net/bugs/1075882 > Tested-by: Cyrus Lien <[email protected]> > Signed-off-by: David Henningsson <[email protected]> > --- > sound/pci/hda/patch_hdmi.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > So far this is the workaround we have found to be working. Sometimes, it also > seems that "cat /proc/asound/cardx/codec#x" can also make the HDMI unsol event > trigger, so that the problem fixes itself. > > We have not run any battery life tests to see if this causes more power > consumption.
Looks safe at least, so I applied to for-next branch to give more testing. If you find a better solution, let me know. thanks, Takashi > > diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c > index 39ca100..3155267 100644 > --- a/sound/pci/hda/patch_hdmi.c > +++ b/sound/pci/hda/patch_hdmi.c > @@ -1288,13 +1288,17 @@ static int hdmi_parse_codec(struct hda_codec *codec) > } > } > > +#ifdef CONFIG_PM > + /* We're seeing some problems with unsolicited hot plug events on > + * PantherPoint after S3, if this is not enabled */ > + if (codec->vendor_id == 0x80862806) > + codec->bus->power_keep_link_on = 1; > /* > * G45/IbexPeak don't support EPSS: the unsolicited pin hot plug event > * can be lost and presence sense verb will become inaccurate if the > * HDA link is powered off at hot plug or hw initialization time. > */ > -#ifdef CONFIG_PM > - if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) & > + else if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) & > AC_PWRST_EPSS)) > codec->bus->power_keep_link_on = 1; > #endif > -- > 1.7.9.5 > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1075882 Title: PantherPoint HDMI - jack detection broken after suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1075882/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
