Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.9 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1649727 Title: No sound card detected with device: Intel Corporation Device 9d71 Status in linux package in Ubuntu: Incomplete Bug description: On a new Dell Inspiron i5378-2885GRY, the sound device is not detected by alsa, and the UI mixer shows a "Dummy" sound card. I've attached the ubuntu-bug dump for the laptop. I confirmed that snd- modules are loaded. The sound card is detected by lshw and lspci. It's a Intel Corporation Device 9d71. Fastboot is not enabled; boot is "thorough". The sound card *did* work on two separate occasions - i.e. was detected successfully. On all subsequent boots it is not detected. See also bugs 1641028 and 1649668. Googling for this device also shows a smattering of other problems that people are having with it. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1649727/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
