On Sun, Aug 27, 2017 at 8:24 PM, IceAmber <iceamber2015@gmail.com> wrote:
> iceamber@localhost:~ $ grep NOUVEAU /usr/src/linux/.config
> CONFIG_DRM_NOUVEAU=m
> CONFIG_NOUVEAU_DEBUG=5
> CONFIG_NOUVEAU_DEBUG_DEFAULT=3
> CONFIG_DRM_NOUVEAU_BACKLIGHT=y
>
> iceamber@localhost:~ $ grep -E 'nvidia|VIDEO_CARDS' /etc/portage/make.conf
> VIDEO_CARDS="nouveau"
>
> here is the `grep -si nouveau /var/log/*`
>
> I have rebuilt the xorg-server, it is built for kernel 4.12.5 now.
> And I have set the USEs of "gallium" and "video_cards_nouveau"
>
> On Sun, Aug 27, 2017 at 4:54 PM, Alexander Kapshuk
> <alexander.kapshuk@gmail.com> wrote:
>>
>> On Sun, Aug 27, 2017 at 5:49 PM, Alexander Kapshuk
>> <alexander.kapshuk@gmail.com> wrote:
>> > On Sun, Aug 27, 2017 at 5:45 PM, Alexander Kapshuk
>> > <alexander.kapshuk@gmail.com> wrote:
>> >> On Sun, Aug 27, 2017 at 2:27 PM, IceAmber <iceamber2015@gmail.com>
>> >> wrote:
>> >>> I have tried, but the same result
>> >>>
>> >>> On Sun, Aug 27, 2017 at 10:04 AM, Adam Carter <adamcarter3@gmail.com>
>> >>> wrote:
>> >>>>>
>> >>>>> yes, here is the eselect
>> >>>>
>> >>>>
>> >>>> When i have X problems i can resolve i run emerge -av
>> >>>> @x11-module-rebuild
>> >>>> xorg-server mesa but its generally an act of desperation after
>> >>>> running out
>> >>>> of intelligent options.
>> >>>
>> >>>
>> >>
>> >> Your xorg-server was built for kernel 4.9.34.
>> >> [    24.014] Build Operating System: Linux 4.9.34-gentoo x86_64 Gentoo
>> >> [    24.014] Current Operating System: Linux localhost 4.12.5-gentoo
>> >> #10 SMP Sat Aug 26 13:15:20 UTC 2017 x86_64
>> >>
>> >> Might be a good idea to rebuild x11-base/xorg-server for your current
>> >> kernel.
>> >>
>> >> What's the output of the command lines below?
>> >> grep NOUVEAU linux/.config
>> >> grep -E 'nvidia|VIDEO_CARDS' /etc/portage/make.conf
>> >
>> > This one too please:
>> > grep -si nouveau /var/log/*
>>
>> Also, let's make sure mesa has the USE flags below enabled:
>>
>> equery -q u mesa | grep -E 'gallium|nouveau'
>> +gallium
>> +video_cards_nouveau
>>
>

I'm not seeing these errors in your Xorg.0.log any more:
[    25.361] (EE) AIGLX error: Calling driver entry point failed
[    25.375] (EE) AIGLX: reverting to software rendering

Are you still getting the error message about the nouveau driver not
being loaded when running glxinfo or glxgears?
If you are, what's the output of:
lsmod nouveau
modinfo /lib/modules/`uname -r`/path/to/nouveau.ko