At Wed, 20 May 2015 16:31:55 +0200, Martin Steigerwald wrote: > > Hello! > > On ThinkPad T520 (Intel Sandybridge) with 4.14-rc4 + two BTRFS patches and > one Intel P-State debug patch I have no sound output on internal Intel HD > audio codec. > > According to ThinkPad T520 LED with striked-through speaker the loud speaker > is in disabled state. Also KDE´s Phonon says a soundcard is missing. In > alsa-mixer I see nothing as MM for muted. If I press the key next to the LED > I get a notification on the desktop that loud speaker has been enabled / > disabled, but the LED still is on for it being disabled. > > I do not hear anything in Amarok or with aplay. alsa-mixer sound volumes are > 100 for master and PCM. I also tried with disabling "Auto-Mute Mod", but > still no sound. > > When I reboot and in BIOS or GRUB press the key then the LED toggles state. > > When I reboot into Linux 4.0.1 sound is working fine and loud speaker > disabled LED is toggled off, so I bet this is a regression 4.1-rc4 compared > to 4.0.1.
Please run alsa-info.sh at both working and non-working cases (with old and new kernels), and attach the outputs. Run the script with --no-upload option. Also, such a problem is rather the device permissions problem. Check the device permissions of /dev/snd/* files (also check getfacl /dev/snd/*, too). Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
