1. 01 Apr, 2015 1 commit
    • Stefan Lippers-Hollmann's avatar
      x86/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk · 80313b30
      Stefan Lippers-Hollmann authored
      The ASRock Q1900DC-ITX mainboard (Baytrail-D) hangs randomly in
      both BIOS and UEFI mode while rebooting unless reboot=pci is
      used. Add a quirk to reboot via the pci method.
      
      The problem is very intermittent and hard to debug, it might succeed
      rebooting just fine 40 times in a row - but fails half a dozen times
      the next day. It seems to be slightly less common in BIOS CSM mode
      than native UEFI (with the CSM disabled), but it does happen in either
      mode. Since I've started testing this patch in late january, rebooting
      has been 100% reliable.
      
      Most of the time it already hangs during POST, but occasionally it
      might even make it through the bootloader and the kernel might even
      start booting, but then hangs before the mode switch. The same symptoms
      occur with grub-efi, gummiboot and grub-pc, just as well as (at least)
      kernel 3.16-3.19 and 4.0-rc6 (I haven't tried older kernels than 3.16).
      Upgrading to the most current mainboard firmware of the ASRock
      Q1900DC-ITX, version 1.20, does not improve the situation.
      
      ( Searching the web seems to suggest that other Bay Trail-D mainboards
        might be affected as well. )
      --
      Signed-off-by: default avatarStefan Lippers-Hollmann <s.l-h@gmx.de>
      Cc: <stable@vger.kernel.org>
      Cc: Matt Fleming <matt.fleming@intel.com>
      Link: http://lkml.kernel.org/r/20150330224427.0fb58e42@mirSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      80313b30
  2. 31 Mar, 2015 2 commits
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