On Tue, 2017-11-28 at 09:14 +0100, Peter Zijlstra wrote: > On Tue, Nov 28, 2017 at 10:08:53AM +0800, Zhang Rui wrote: > > > > Hi, All, > > > > My Surface Pro 4 is unable to boot after 4.12. The symptom is that > > kernel freezes during boot, and the last message in the screen is > > loading the initrd image. And I have bisected it to this commit > > > > +// DEADLINE_MODEL_MATCH_REV ( INTEL_FAM6_SKYLAKE_MOBILE, > > 0xb2), > And what microcode version do you run? Have you installed the latest > microcode package and updated your initrd to include it? My skylake > is > running 0xba.
No, I didn't upgrade my microcode. $ cat /proc/cpuinfo ... processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 78 model name : Intel(R) Core(TM) i7-6650U CPU @ 2.20GHz stepping : 3 microcode : 0x9e ... I suppose the problem should be gone if I upgrade the microcode. But the real problem to me is that the system FREEZES after kernel upgrade. thanks, rui
