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Old 12-04-2013, 02:48 PM   #1
LQ Newbie
Registered: Nov 2013
Posts: 19

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Question Bumblebee [Optimus] BBswitch wont load anymore

Hi, Im here because I have this particular situation. I tried to google but couldnt find an answer.

I have an ASUS N53SV laptop with a Geforce 540M with Nvidia Optimus technology.

I had installed bumblebee and It worked perfectly fine, until 2 days ago, In wich I have no clue, BBSwitch wont load, I see the Nvidia video card ON, sucking on my battery and heating up my computer.

Im runing Slackware 14.1 x86_64 with multilib enabled.

What really bothers me is that it was working perfectly fine, and put of the nowehere it stoped loading.

First time, I installed it following this guide (a month ago, right after Slackware14.1 released and clean install)

I even installed it enabling COMPAT32 (32bits compatibility on a 64bits system)

then, when I noticed It wasnt working I decided to reinstall it, no changes.

Then, reinstalled it without COMPAT32. Nothing

Then, I checked this:

Where I tried to:

# cat /proc/acpi/bbswitch
and echoes this:
cat: /proc/acpi/bbswitch: No such file or directory
I wondered what happened..

So, I decided to download and reinstall Bbswitch..

Donloaded from here:

and following the instruction:

make install
make load
n4rf@ASUS:~\>> cd Downloads/
n4rf@ASUS:~/Downloads\>> cd bbswitch-master
n4rf@ASUS:~/Downloads/bbswitch-master\>> su
root@ASUS:/home/n4rf/Downloads/bbswitch-master# make
make -C /lib/modules/3.10.17/build M="$(pwd)" modules
make[1]: Entering directory `/usr/src/linux-3.10.17'
  Building modules, stage 2.
  MODPOST 1 modules
make[1]: Leaving directory `/usr/src/linux-3.10.17'
root@ASUS:/home/n4rf/Downloads/bbswitch-master# make install
mkdir -p /lib/modules/3.10.17/misc/bbswitch
install -m 0755 -o root -g root bbswitch.ko /lib/modules/3.10.17/misc/bbswitch
depmod -a
root@ASUS:/home/n4rf/Downloads/bbswitch-master# make load
rmmod bbswitch
rmmod: ERROR: Module bbswitch is not currently loaded
make: [load] Error 1 (ignored)
insmod bbswitch.ko

if I go:

# cat /proc/acpi/bbswitch  
0000:01:00.0 ON
Now it seems BBswitch is loaded..

I get this issue

Turn the card off, respectively on:

# tee /proc/acpi/bbswitch <<<OFF
# tee /proc/acpi/bbswitch <<<ON

If the card stays on when trying to disable it, you've probably forgotten to unload the driver,
$ dmesg |tail -1
bbswitch: device 0000:01:00.0 is in use by driver 'nouveau', refusing OFF

Do not attempt to load a driver while the card is off or the card won't be usable until the PCI configuration space has been recovered (for example, after writing the contents manually or rebooting).

If I go:

dmesg | grep -C 10 bbswitch
[   32.054778] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   35.414690] wlan0: authenticate with 1c:bd:b9:75:97:7c
[   35.436856] wlan0: send auth to 1c:bd:b9:75:97:7c (try 1/3)
[   35.439130] wlan0: authenticated
[   35.439154] ath9k 0000:03:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[   35.439157] ath9k 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[   35.439904] wlan0: associate with 1c:bd:b9:75:97:7c (try 1/3)
[   35.442653] wlan0: RX AssocResp from 1c:bd:b9:75:97:7c (capab=0x411 status=0 aid=2)
[   35.442963] wlan0: associated
[   35.442976] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  844.568296] bbswitch: version 0.7
[  844.568306] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[  844.568313] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.GFX0
[  844.569080] bbswitch: detected an Optimus _DSM function
[  844.569094] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on

root@ASUS:/home/n4rf/Downloads/bbswitch-master# uname -a
Linux ASUS 3.10.17 #2 SMP Wed Oct 23 16:34:38 CDT 2013 x86_64 Intel(R) Core(TM) i5-2430M CPU @ 2.40GHz GenuineIntel GNU/Linux

BUt, here is the BIG BUT!


Im back to this!

# cat /proc/acpi/bbswitch

cat: /proc/acpi/bbswitch: No such file or directory
Any ideas????
Old 12-06-2013, 11:03 AM   #2
Registered: Jan 2005
Location: Midwest USA, Central Illinois
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Member Response


Try using 'su -';
excerpt from 'man su';
-, -l, --login
Provide an environment similar to what the user would expect had the user logged in directly.

When - is used, it must be specified as the last su option. The other forms (-l and --login) do not have this restriction.
Old 10-09-2015, 06:34 AM   #3
LQ Newbie
Registered: Oct 2015
Posts: 1

Rep: Reputation: Disabled
had the same problem in my Slackware 14.1
after installing bbswitch you need to blacklist nouveau or other drivers to prevent loading after boot.
create "/etc/modprobe.d/nouveau_blacklist.conf" file and write the following:

blacklist nouveau
options nouveau modeset=0

blacklist nvidia

options bbswitch load_state=0
The first line will block the nouveau module from being loaded automatically during start-up. The module will still be able to be loaded manually by a user or by the X server. Thus, the second line is added, so that should the nouveau module be loaded, it will be prevented from doing a kernel modeset, allowing the module to be unloaded.The last line disables the card on boot time.
Now you will need to create an initial RAM disk (“initrd” for short). The initrd functions as a temporary root file system during the initial stage of the kernel booting, and it helps get the actual root system mounted when your system boots. Run this, as root:

This command will not actually do anything. It is informational only, and will output something like this - depending on your kernel version, your hardware configuration, the root filesystem you chose when you installed Slackware and so on:
# revision 1.45                                                                           
# This script will now make a recommendation about the command to use
# in case you require an initrd image to boot a kernel that does not
# have support for your storage or root filesystem built in
# (such as the Slackware 'generic' kernels').
# A suitable 'mkinitrd' command will be:

mkinitrd -c -k 3.2.29 -f ext4 -r /dev/sdb2 -m usb-storage:ehci-hcd:usbhid:ohci-hcd:mbcache:jbd2:ext4 -u -o /boot/initrd.gz
Run the script's suggested mkinitrd commandline (as root) to generate the initrd.gz image.
If you have installed LILO (the default bootloader of Slackware), then you will also need to make changes to its configuration file "/etc/lilo.conf" by adding a section to your Slackware entry as follows:

image = /boot/vmlinuz
  initrd = /boot/initrd.gz  # add this line so that lilo sees initrd.gz
  root = /dev/sda1
  label = Slackware
After making the changes to /etc/lilo.conf you have to save the file and then run:

lilo -v
To make your changes permanent, then reboot.
To make sure that nouveau is not loaded run:

lsmod | grep nouveau

If you still see nouveau in the output, there is some problem and the driver is not unloaded successfully.
If "/proc/acpi/bbswitch" is not there load it by reinstalling or start bumblebeed by
 /etc/rc.d/rc.bumblebeed start
it should be there,Now turn off your card:
tee /proc/acpi/bbswitch <<< OFF
To see results after anu command you can use "dmesg". You should be good now...


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