On 7/29/20 4:50 AM, Thomas Gleixner wrote: > Scott, > > Scott Branden <[email protected]> writes: >> On 2020-07-28 1:22 a.m., Thomas Gleixner wrote: >>> Scott Branden <[email protected]> writes: >>>> Bios now updated to latest. Same kernel panic issue. Log below. >>>> >>>> I think it is related to power cycling quickly. >>>> Should APIC work if PC power cycled in a few seconds or is that the >>>> problem? >>> Yes, emphasis on should. Just to clarify, if you reboot it works and >>> cold start works as well if power was off long enough? >>> >> So far I have only been able to reproduce the issue by cold start with power >> off for only a few seconds >> before re-powering the system. It has not failed via reboot yet that I >> remember. >> Will have to keep my eye on whether using reboot is an issue or not. >> And also keeping power off longer when doing a cold start. > > Weird. > >> Please find attached the failed console log with ignore_loglevel. > > Aside of the differences caused by the BIOS update there is nothing > related to the APIC/IO-APIC setup which is different between the working > and failing boot. > > TBH, I have no idea what's going wrong there. Maybe Tom has one.
I asked around and was told this is most likely the motherboard has not decayed its DC rails. So it's quite possible that keeping it powered off for a longer period of time before powering back on may help. Thanks, Tom > > Thanks, > > tglx >
