[Bug 60852] Random memory corruption reported after writing to /sys/module/drm_kms_helper/parameters/edid_firmware

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60852

--- Comment #6 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Alex Villacis Lasso from comment #5)
> (In reply to Chris Wilson from comment #2)
> > You need to set that parameter on the command line for it to have effect for
> > LVDS. I guess no one checked whether changing it on the fly was safe...
> 
> In mainline kernel with Fedora 18, if I set the kernel parameter, the kernel
> hangs for more than a minute before mounting the root filesystem and booting
> normally. The distro kernel does not hang (3.10.10), but I already
> downloaded the source RPM and cannot find which patch, if any, solves this.

Wild guess, the distro kernel has CONFIG_FW_LOADER_USER_HELPER=n.

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