Re: [gentoo-user] Problems booting vanilla kernel 4.1.x

[Fernando Rodriguez]

On Sunday, August 30, 2015 6:11:00 PM Fernando Rodriguez wrote:
> On Sunday, August 30, 2015 10:51:57 PM Peter Weilbacher wrote:
> > Hi Fernando,
> >
> > On Sun, 30 Aug 2015, Fernando Rodriguez wrote:
> >
> > > 1. Add loglevel=7 to your kernel parameters and see what it prints
before 
> it
> > > hangs.
> >
> > That helped, it showed me something about drm, so...
> >
> > > 3. From your kernel parameters I assume you're using the radeon free
> driver
> > > right? If that's the case disable it (don't compile it in or just delete
> the
> > > module) and try to boot wiith a framebuffer.
> >
> > ... this was a good suggestion. Switching off DRM/Radeon gets me a
> > kernel that boots. However, with that config I cannot run X (which then
> > complains about missing kernel mode switching). If I follow
> > wiki.gentoo.org/wiki/Xorg/Guide#Kernel_modesetting I again arrive at the
> > kernel settings that I previously had and which didn't work with 4.1.x.
> >
> > Any more suggestions?
> >    Peter.
> >
>
> At least you norrowed down, that was the idea.
> I would suspect a new bug, so post to the radeon mailing list. Doing the git
> bisect first will make it easier for them so they'll be more willing to help.
I 
> would try booting without those radeon paremeters first.
>
> You could try the proprietary driver but the one in the portage tree will
not 
> build with a kernel >3.18.19 but if you search b.g.o there are patches to
make 
> it build. Or you could try my ebuild but I'm not sure that it will build
> either since I'm using 3.18.20 now:
>
> https://github.com/fernando-rodriguez/portage-overlay/tree/master/x11-drivers/ati-drivers

And you should still try suggestion #2 because it's very likely to only affect 
one specific configuration.

-- 
Fernando Rodriguez