<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [hsw dp audio] Muting S/PDIF turns off DP" href="https://bugs.freedesktop.org/show_bug.cgi?id=75729#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [hsw dp audio] Muting S/PDIF turns off DP" href="https://bugs.freedesktop.org/show_bug.cgi?id=75729">bug 75729</a> from <a class="email" href="mailto:consume.noise@gmail.com" title="Daniel Martin <consume.noise@gmail.com>"> Daniel Martin</a> <pre>(In reply to <a href="show_bug.cgi?id=75729#c3">comment #3</a>) > Hi Martin/Jani, > > Sorry for the late reply. No problem, as stated it's not a showstopper for me. (And I'm even worse with replies.) > I don't think this is an audio driver issue, because audio driver operations > does not directly cause screen on/off. Screen on/off is controlled by Gfx > driver. > > For Haswell, the display audio devices (controller + codec) share the same > power well with display. So the audio verb excution, such as muting/unmuting > S/PDIF can wake up the audio devices and the audio driver will request power > from Graphic driver. When audio devcies are idle (in D3), the audio driver > will notify gfx driver it does not need the power. That's all. And even if > the gfx driver keeps the power well always on, it can still turn on/off the > screen. > > It seems to me that some user space module binds ALSA S/PDIF mute control > with screen on/off. What do you mean by "user space module", some ALSA module configured with alsa.conf and friends? The only ALSA configuration I set is to choose the card with S/PDIF as default. I'll remove it for testing and may temporarily remove system provided ALSA configurations as well. Everything else is as bare as a fresh Archlinux installs it, using slim for login and spectrwm as WM. So, no fency hidden stuff should happen.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>