<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#c65">Comment # 65</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:hhfeuer@gmx.de" title="Maik Freudenberg <hhfeuer@gmx.de>"> Maik Freudenberg</a> <pre>I feel like I'm jumping from puddle to puddle now. Lukas, I previously couldn't test your patches due to an acpica bug affecting my machine rendering results useless. Luckily, this has been fixed now. Meanwhile, I discovered that (at least) kernels 4.9-4.13 suffer from some pci config space bug making re-reading the header type impossible. The kernel will always put out a cached version thus making it impossible to enable the hda dev with any method, even remove/rescan. So a fair warning to users running a 4.9LTS kernel trying to turn on audio. Kernel series 4.4 or 4.14+ work. Now with the acpi bug fixed, I applied both of your v2 patchsets with some nip/tuck to a 4.16rc4+ kernel and ran into the next oddity: while the pci quirk in general works, re-reading the header type will always return 0x00 so the hda device is not added. lspci confirms that the quirk is otherwise working: 00: de 10 92 12 07 00 10 00 a1 00 02 03 00 00 80 00 480: 00 00 00 00 17 00 00 00 00 00 00 02 00 00 00 00 I'll investigate what's happening the next days.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>