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List:       freedesktop-xorg
Subject:    Re: [Dell Vostro 3300] running bumblebee in Ubuntu 14.04 results in call trace in logs
From:       Alex Deucher <alexdeucher () gmail ! com>
Date:       2014-07-09 17:54:55
Message-ID: CADnq5_P_zKU3bAeywYcg85ob3G2mrFu5iyBOYVd7h+eTC7H4RQ () mail ! gmail ! com
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On Wed, Jul 9, 2014 at 11:44 AM, Sayantan Das <sayantan13@gmail.com> wrote:
> Hi there,
> 
> As per the request from Ubuntu devs, I am reporting this issue in the
> xorg mailing list. Please see the details below
> 
> [1.] One line summary of the problem:
> 
> [Dell Vostro 3300] running bumblebee in Ubuntu 14.04 results in call
> trace in logs
> 
> [2.] Full description of the problem/report:
> While booted into the newest mainline kernel- installing bumblebee and
> nvidia-331  results in call trace.

I'm not familiar with bumblebee, but I know that when you call the
acpi methods for hybrid laptops to enable/disable the dGPU, it
generates a pci hotplug event and the pciehp or acpihp driver will
attempt to unload the driver.  The acpihp driver was changed[1] to
ignore the event, but as far as I know the pciehp driver still needs
to be fixed.

[1] - http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f244d8b623dae7a7bc695b0336f67729b95a9736


Alex
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