Bug#756522: bumblebee-nvidia: cannot access secondary gpu - error: Permission denied

Dirk Linnerkamp dirk.linnerkamp at online.de
Mon Jan 5 08:42:00 UTC 2015

Hi Vincent,

Am 05.01.2015 um 03:59 schrieb Vincent Cheng:

>> The solution (for me) was, that I had to DELETE the BusID parameter in my
>> "/etc/bumblebee/xorg.conf.nvidia". I set this parameter at first manually,
>> as you suggested. I checked twice if it was the correct number, but the
>> error message remained.
> Hmm, ok, good to know I suppose. By default the BusID parameter in
> /etc/bumblebee/xorg.conf.{nouveau,nvidia} is commented out anyways,
> and users should only fiddle with it if they can't get bumblebee
> working as-is.

I am relatively sure that I tried both at that time. With and without 
this  "BusID: xxxx" - parameter. But unfortunately I am not sure ): 
about it any longer.

So for me it looks, as far as I can say now, that it indeed might has 
sonething to do with the nvidia-driver and not directly with bumblebee 
as was mentioned in the discussion on GitHub and which has been fixed 
now after the latest update.

I only can say for sure now, that as soon as I uncomment the BusID with 
the correct card number being set, the "Permission Denied" message 
returned and that the additionel "ScreenSection" lines in the 
xorg.conf.nvidia, which should help on some Debian Jessie machines, does 
nothing for me.

Kind Regards

Dirk Linnerkamp

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