Reverting rmmod->modprobe change in bumblebee/3.2.1-8 (was: Re: Bumblebee functionality broken by the last update made by Vincent Cheng on 26-July-2015 - please react as fast as possible)

[Luca Boccassi]

On Fri, 2015-08-07 at 01:07 -0700, Vincent Cheng wrote:
> Hi Luca,
> 
> (cc-ing upstream and original bug reporter)
> 
> It seems that your fix for #793389 (the rmmod->modprobe patch you
> committed as [1]), which I recently backported to the bumblebee PPA
> [2] (source at [3]) to keep the PPA packages in sync with the packages
> in Debian/Ubuntu, is likely the source of a regression for Ubuntu
> users using that PPA (see conversation below, and [4]), i.e. the
> nvidia kernel module isn't being automatically unloaded using modprobe
> for some reason (but apparently worked with rmmod previously). I'm not
> sure why this happens; I suspect it has something to do with Ubuntu's
> nvidia packages not including an alias even though they rename the
> module like Debian's packages. Since it does cause a regression in
> Ubuntu, and just by skimming #793389 I don't quite understand whether
> this fixes anything in Debian (isn't the fix for #793386 enough to fix
> module unloading?), would you be ok with me reverting [1]? Upstream is
> also suggesting that the patch be reverted.

Hello Vincent,

I have pushed a new branch for review on Alioth [1], please have a look
when you have time.

The idea is, if building on Ubuntu, to add an alias and a remove rule
for each driver supported by Bumblebee.

The alias is necessary because it seems that, due to how the
update-alternatives is handled on Ubuntu, a modprobe rule for the driver
is not installed if the main provider of libgl is not the Nvidia driver
itself.

Please let me know what you think!

Kind regards,
Luca Boccassi

[1]
http://anonscm.debian.org/cgit/pkg-nvidia/bumblebee.git/commit/?h=ubuntu-aliases&id=04e263ccf5e4485c7d49718aace19342d3d6d4f9
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