What does this backtrace mean?

[Alex Villací­s Lasso]

El 01/12/16 a las 13:42, Adam Jackson escribió:
> On Wed, 2016-11-30 at 13:01 -0500, Alex Villací­s Lasso wrote:
>> El 28/11/16 a las 19:59, Alex Villacís Lasso escribió:
>>> I have this computer (Acer Aspire One ZG5 using Fedora 25 32-bits)
>>> where the backtrace shown below appears every single time the
>>> machine boots. What does it mean? Should I be worried about it?
>>> Last seen on kernel version 4.8.8.
>>>
>> Is this the right list to ask this question?
> Maybe.  intel-gfx at lists.freedesktop.org might be more appropriate since
> this is a kernel driver bug.
>
>>> [    4.884815] WARN_ON(!connector->state->crtc)
> What this is saying is the driver had some expectations about the state
> the hardware would be in when efifb handed the device off, and those
> expectations were violated. If there's no functional problem you can
> safely ignore it, but it's a kernel driver bug either way.
>
> - ajax

Thanks for your answer. I will collect more information and create a proper bug report. BTW, the laptop is legacy BIOS only - no EFI support present.