<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [NVC1] HDMI audio device only visible after rescan" href="https://bugs.freedesktop.org/show_bug.cgi?id=75985#c45">Comment # 45</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [NVC1] HDMI audio device only visible after rescan" href="https://bugs.freedesktop.org/show_bug.cgi?id=75985">bug 75985</a> from <a class="email" href="mailto:dennis.lissov@gmail.com" title="Denis Lisov <dennis.lissov@gmail.com>"> Denis Lisov</a> <pre>(In reply to Lukas Wunner from <a href="show_bug.cgi?id=75985#c37">comment #37</a>) > Related to this issue, I've just posted v2 of my patch set to use a device > link for power management of GPU-integrated HDA controllers: > <a href="https://lists.freedesktop.org/archives/dri-devel/2018-March/168012.html">https://lists.freedesktop.org/archives/dri-devel/2018-March/168012.html</a> > > It would be great if more people could test it. There's a 4.15-based branch > available at: > <a href="https://github.com/l1k/linux/commits/switcheroo_devlink_v2">https://github.com/l1k/linux/commits/switcheroo_devlink_v2</a> Tested these patches on Lenovo Thinkpad P50. Audio works, the HDA and GPU suspend when unused with no errors in logs and resume when needed. HDA unbind/bind worked with no errors, some "Too big adjustment {128,384}" messages in dmesg. For this hardware, even a plugged in HDMI TV on boot does not cause the audio device to appear, so the test was done with a PCI early quirk like suggested in this bug.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>