On Tue, May 28, 2013 at 12:51:19PM -0700, John Stultz wrote: > On 05/26/2013 12:25 PM, Jens Taprogge wrote: > >Hi all. > > > >Linux 3.9.3 hangs early during boot on a Lenovo Thinkpad X1 Carbon (Ivy > >Bridge). v3.9.2 works. I have bisected the hang to > > d96ac6f2: time: Revert ALWAYS_USE_PERSISTENT_CLOCK compile time optimizaitons. > > > >Reverting d96ac6f2 on top of v3.9.4 makes the kernel boot. I do not > >have any additional information as the kernel hangs before anything is > >displayed. The config of v3.9.4 with d96ac6f2 reverted is attached. > > So with 3.9.4 (nothing reverted), what was the config you were using > to boot? > > Does changing CONFIG_RTC_HCTOSYS change the behavior? > > thanks > -john Hello John, turns out things behave quite differently with the patch reverted and not reverted. Since there is no output, I can not tell whether I am seeing one or two problems. With vanilla 3.9.4: CONFIG_RTC_HCTOSYS=y works CONFIG_RTC_HCTOSYS=n does not work CONFIG_CPU_FREQ_STAT has no effect With d96ac6f2 reverted: CONFIG_CPU_FREQ_STAT=n works CONFIG_CPU_FREQ_STAT=y does not work Please see several configurations attached. Best Regards, Jens
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