Bug#647095: CPU hyperthreading turned on after soft power-cycle

Ok, this also confirms that the board had issues *before* any changes were made to the RTC core. I'd push the board vendor to update the BIOS to avoid this issue. Even so, I'm curious as to what exactly trips it up. Maybe we can provide a module option for the rtc-cmos driver to disable the ala

Bug#647095: CPU hyperthreading turned on after soft power-cycle

Using an older "known-good" kernel, could you build and run the test case at the end of Documentation/rtc.txt a few times and see if it triggers the same problem? I'm suspicious that the setting the alarm is whats tripping the BIOS into enabling the HT bit. Because with older kernels, we used P

Bug#647095: CPU hyperthreading turned on after soft power-cycle

Hi all, Result of bisecting: v2.6.38-rc1 exhibits the problem. v2.6.37 and many of the topic branches merged in the 2.6.38 merge window work ok. Some other topic branches do not boot at all. Jiri: if you have gitk installed, then "git bisect visualize" can help get a sense of what's in the mid

Bug#647095: CPU hyperthreading turned on after soft power-cycle

Hi all, Hi Jiri, Jiri Polach wrote: On Ben's advice I am trying to locate the commit that causes the problem to appear more precisely using 'git bisect'. However, too many of generated revisions are unbootable so I have to use 'bisect skip' frequently. Ok, so I've looked over the log at

Bug#647095: CPU hyperthreading turned on after soft power-cycle

On 10/30/2011 4:25 PM, Ben Hutchings wrote: On Sun, 2011-10-30 at 07:05 -0400, Jiri Polach wrote: Package: linux-2.6 Version: 2.6.39-3~bpo60+1 Severity: normal When the computer is turned off using "shutdown -h" or "halt" command, the hypertherading BIOS setting is changed - even if hyperthera