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Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht", disappearing with "acpi=off"

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On Fri, Oct 02, 2015 at 11:59:38AM +0200, Niccolò Belli wrote:
> Hi,
> This laptop suffers of random kernel hangs at boot: I tested kernel 4.1.8,
> 4.2.1 and 4.3-rc3 and they are all affected.
> Every time I turn on my laptop I have to boot several times to be able to
> reach the sddm login because often I get hangs which prevent the system to
> boot. Once booted I don't have any problem anymore, until the next boot.
> 
> With "acpi=off" the system boots flawlessly, while with "acpi=ht" I still
> get random hangs, so I guess the problem is in the ACPI table parsing code
> itself, or perhaps the SMP code.
> 
> I recompiled kernel 4.3-rc3 with CONFIG_ACPI_DEBUG=y and I attached full log
> from a serial console, booting with "debug acpi.debug_level=0x2003" (warn,
> error and tables debug enabled):
> https://bugzilla.kernel.org/attachment.cgi?id=189041
> 
> Distro is Arch Linux. Please let me know if you need further logs.
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=105251

Does it work any better if you blacklist the crashing module
"snd_soc_rl6347a" (or set CONFIG_SND_SOC_RL6347A=n)?
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[Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht", disappearing with "acpi=off" Niccolò Belli <niccolo.belli@linuxsystems.it> - 2015-10-02 12:10 +0200
  Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht",  disappearing with "acpi=off" Mika Westerberg <mika.westerberg@linux.intel.com> - 2015-10-02 12:20 +0200
    Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht", disappearing with "acpi=off" Niccolò Belli <niccolo.belli@linuxsystems.it> - 2015-10-03 12:20 +0200
      Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht",  disappearing with "acpi=off" Mika Westerberg <mika.westerberg@linux.intel.com> - 2015-10-05 12:50 +0200
        Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht", disappearing with "acpi=off" Niccolò Belli <niccolo.belli@linuxsystems.it> - 2015-10-05 15:50 +0200
          Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht",  disappearing with "acpi=off" Mika Westerberg <mika.westerberg@linux.intel.com> - 2015-10-05 16:00 +0200
            Re: [Dell XPS 13 9343] Random kernel Oops at boot with "acpi=ht", disappearing with "acpi=off" Niccolò Belli <niccolo.belli@linuxsystems.it> - 2015-10-05 18:00 +0200

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