[PlanetCCRMA] another nvidia driver problem

Oded Ben-Tal oded at ccrma.Stanford.EDU
Sat Mar 14 15:56:35 PDT 2015

For what its worth, I actually got a refurbished t410 thinkpad(*) not a new
machine so maybe I'm running into additional/different problems. I could get
akmod working even before the rt-kernel stage. I tried a few different times
and got into an impasse where the system wouldn't finish booting. I also tried
the hack that Chris suggested and couldn't get that working either. So at this
point I am almost ready to give up. Perhaps I'll give this bumblebee a try (if
I figure out that its supposed to maybe work on my hardware). 
I only managed very light testing of the current ccrma rt-kernel (on fedora
21) and the system froze on me. completely. I had to manually shutdown. The
non-rt kernel seems to be working fine (trying a few things with SC). 

(*) this seemed the only reasonable option that still had expresscard slot
available. I'm hoping this would keep me going till some alternative hardware
solution arrives on the scene. 

On Sat, 14 Mar 2015 13:43:40 -0400, Juan Reyes wrote
> Hi Oded, Chris,
> Thanks for the tip Chris!.
> Are you guys able to compile akmod on RT Kernels?.
> BTW, It might compile but then when staring gdm will go on an 
> infinite loop afaik. On 'telinit 3', trying to start 'X' manually, 
> 'X' will complain about not finding the right LCD screen. Could not 
> get how to hack this issue, -so frustrating and time consuming-.
> ...
> Just for the record, on the W540 I had to get rid of windoze EFI options
> because Fedora's EFI options are still kind of tricky (may be I don't
> understand them well). Also because I was not able to load windoze
> partitions (not that I need them much). This meant ordering disks 
> from Lenovo and starting from scratch.
> But if it's worth, as of now I am able to run the W540 with F-21 nouveau
> drivers using the bumblebee option without an nvidia binary on top. 
> My understanding is that bumblebee allows the driver to access the nvidia
> side of the intel-nvidia graphics card. Not sure if akmod works with
> bumblebee.
> I bet there are limitations using nouveau however, I am not getting lots
> of xruns while using jack and ffado.
> Honestly speaking, it would be great to have the RT Kernel with
> bumblebee and nvidia, just if anyone knows of a "how-to".
>    -- Juan
> > I followed the ritual and the magic incantation is included in
> > grub.cfg but when I look at the boot command /proc/cmdline I don't
> > see these options used. So I'm not sure what is going on. I'm also
> > not sure that linux is using the nvidia graphics (there is also an
> > intel chip in there). I'm trying to figure out how do I even know
> > which card is being used at the moment. Anyway it was worth a try, I
> > guess. Many thanks. Oded
> >
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Oded Ben-Tal
oded at ccrma.stanford.edu

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