kernel 4.3 -> black console

kernel 4.3 -> black console

[Daniel Mota Leite]

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Hi
	Since i upgrade from kernek 4.2.5 to 4.3 i notice that i have no
	console, i get a black screen and the monitor flags no signal.

	When the X is loaded, i get the normal X screen and everything
	works. If i switch to the console using ctrl+alt+f1, again the
	monitor enters in energy saving mode.

	Going back to 4.2.5 everythings works fine.
	I'm using slackware64-current on a A10 APU and mesa 11.0.4

	Any way to fix/debug this, or i will have to bisect it?
	should i restrict the bisect to drivers/gpu/drm/radeon path
	or should use more paths

Thanks in advance for the help
higuita
-- 
Naturally the common people don't want war... but after all it is the
leaders of a country who determine the policy, and it is always a 
simple matter to drag the people along, whether it is a democracy, or
a fascist dictatorship, or a parliament, or a communist dictatorship.
Voice or no voice, the people can always be brought to the bidding of
the leaders. That is easy. All you have to do is tell them they are 
being attacked, and denounce the pacifists for lack of patriotism and
exposing the country to danger.  It works the same in every country.
           -- Hermann Goering, Nazi and war criminal, 1883-1946

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Re: kernel 4.3 -> black console

[Alex Deucher]

On Tue, Nov 10, 2015 at 11:32 PM, Daniel Mota Leite
<daniel@motaleite.net> wrote:
> Hi
>         Since i upgrade from kernek 4.2.5 to 4.3 i notice that i have no
>         console, i get a black screen and the monitor flags no signal.
>
>         When the X is loaded, i get the normal X screen and everything
>         works. If i switch to the console using ctrl+alt+f1, again the
>         monitor enters in energy saving mode.
>
>         Going back to 4.2.5 everythings works fine.
>         I'm using slackware64-current on a A10 APU and mesa 11.0.4
>
>         Any way to fix/debug this, or i will have to bisect it?
>         should i restrict the bisect to drivers/gpu/drm/radeon path
>         or should use more paths

It sounds like you didn't compile fbcon into your kernel or if you
built it as a module, you didn't load it.

Alex
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Re: kernel 4.3 -> black console

[Emil Velikov]

On 11 November 2015 at 05:30, Alex Deucher <alexdeucher@gmail.com> wrote:
> On Tue, Nov 10, 2015 at 11:32 PM, Daniel Mota Leite
> <daniel@motaleite.net> wrote:
>> Hi
>>         Since i upgrade from kernek 4.2.5 to 4.3 i notice that i have no
>>         console, i get a black screen and the monitor flags no signal.
>>
>>         When the X is loaded, i get the normal X screen and everything
>>         works. If i switch to the console using ctrl+alt+f1, again the
>>         monitor enters in energy saving mode.
>>
>>         Going back to 4.2.5 everythings works fine.
>>         I'm using slackware64-current on a A10 APU and mesa 11.0.4
>>
>>         Any way to fix/debug this, or i will have to bisect it?
>>         should i restrict the bisect to drivers/gpu/drm/radeon path
>>         or should use more paths
>
> It sounds like you didn't compile fbcon into your kernel or if you
> built it as a module, you didn't load it.
>
... or the new DRM_FBDEV_EMULATION option ended up set to N ?

-Emil
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Re: kernel 4.3 -> black console

[Daniel Mota Leite]

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Hi

On Wed, 11 Nov 2015 14:45:50 +0000, Emil Velikov
<emil.l.velikov@gmail.com> wrote:
> >>         Since i upgrade from kernek 4.2.5 to 4.3 i notice that i
> >> have no console, i get a black screen and the monitor flags no
> ... or the new DRM_FBDEV_EMULATION option ended up set to N ?

	BINGO!

	I check the config and this was set to N... after enabling i get
the console back to working again.

	I was for sure too sleepy when i was reconfiguring this last
kernel... 

	Thanks for the help
higuita
-- 
Naturally the common people don't want war... but after all it is the
leaders of a country who determine the policy, and it is always a 
simple matter to drag the people along, whether it is a democracy, or
a fascist dictatorship, or a parliament, or a communist dictatorship.
Voice or no voice, the people can always be brought to the bidding of
the leaders. That is easy. All you have to do is tell them they are 
being attacked, and denounce the pacifists for lack of patriotism and
exposing the country to danger.  It works the same in every country.
           -- Hermann Goering, Nazi and war criminal, 1883-1946

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