This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- artful' to 'verification-done-artful'. If the problem still exists, change the tag 'verification-needed-artful' to 'verification-failed- artful'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-artful -- 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/1758829 Title: speaker can't output sound anymore after system resumes from S3 on a lenovo machine with alc257 Status in HWE Next: New Status in linux package in Ubuntu: Invalid Status in linux-oem package in Ubuntu: New Status in linux source package in Xenial: Invalid Status in linux-oem source package in Xenial: Fix Committed Status in linux source package in Artful: Fix Committed Status in linux-oem source package in Artful: Invalid Bug description: [Impact] After booting up, the speaker works well. If we suspend the machine then resume it back, the speaker can't output sound, even rebooting can't make the speaker work, we need to power off the machine then power up the machine, the speaker can work again. [Fix] We need to add the basic support for the codec alc257 first (0001-xxx.patch), then add hooking function for this codec and clear the bit of 15 for register 0x57 (0002-xxx.patch). Both of these two patches come from mainline kernel. [Test Case] After booting up the system, suspend the machine, then resume the machine, test the speaker, the speaker can output sound. Repeat the testing steps many times, the speaker still can work. [Regression Potential] Very low, since the 1st patch just add the support for a new codec alc257, it will not affect other codecs. The 2nd patch just apply a fix for alc257, it doesn't affect other codecs too. And both of them come from mainline and realtek. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1758829/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp