Hi Adrian,
On Sun, Oct 23, 2016 at 10:41:57AM +0300, Adrian Bunk wrote: > Control: reassign -1 src:linux > > On Sun, Oct 23, 2016 at 06:57:53AM +0800, Toni Mueller wrote: > > Package: upgrade-reports > > Severity: important > > recently, I felt the need to upgrade my XPS 13 laptop (2013 model?) from > > Jessie to Stretch, but have not had any sound ever since. > > > > To be more precise, I had no sound ever after trying the 4.7 backported > > kernel on Jessie, which was what originally prompted me to upgrade to > > Stretch. > >... > > thanks for your report. > > This sounds like a bug in the kernel, I'm moving it there. in the meantime, the problem was resolved. Short story: After booting the 4.x kernel for the first time, sound disappeared. I recently did a factory reset in the BIOS, and sound re-appeared. So yes, at this point, I also suspect that there is some problem with the kernel, but why this seemingly happens only on upgrade, I don't know. Cheers, --Toni++