Hi On 2015-01-27, Pierre GINDRAUD wrote: > Hello evryone, > > I'm not sure that is the best mailing list to expose my problem, but I try > anyway While this is a hardware (UEFI firmware, well basically the BIOS) issue, the only way to (eventually) work around this problem is from the kernel side. Accordingly a kernel specific mailing list, probably upstream (lkml) or Debian specific (BTS, debian-kernel) are probably better venues. > I've bought recently, an motherboard in order to make a simple server in my > home, the model is a ASROCK Q2900 ITX (see documentation below) > http://www.asrock.com/mb/Intel/Q2900-ITX/ > > My problem occur when I reboot the MB. > If I turn off (shutdown -h now) and push physically the power button it > successfully restart > But if I type `reboot` the MB turn off but doesn't power on, the boot > freeze just after showing POST screen of the bios. > > During my test, I've try to put "acpi=off" option to kernel and the reboot > problem disappear, but this time it's the shutdown process which is > impacted. When I type shutdown the system succesfully halt but the MB > doesn't physically poweroff Please don't use "acpi=off", it not only disables SMP but may also cause damage to your mainboard. > Can anyone already had a similar problem ? You can try to use "reboot=pci" as kernel parameter, I'm having similar (but intermittent) problems on an ASRock Q1900DC-ITX where this seems to help (but it's a bit too early to be sure about it, so a bit too early to submit the according kernel quirk). Regards Stefan Lippers-Hollmann
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