Eduardo It helped
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https://bugs.launchpad.net/bugs/1338404
Title:
bbswitch: fails to find ACPI handle for discrete card
Status in bbswitch package in Ubuntu:
Hello!
Today, after an update of Ubuntu 14.04 I had the error message reported in this
bug: bbswitch: No discrete VGA device found.
Yesterday when I installed the latest updates availble I noticed that it was
installing nvidia-331-updates*, nvidia-libopencl-*, nvidia-prime and nvidia
settings.
@atterdag:
On the W520 I also ran into this issue. After removing the pci=noacpi kernel
parameters required to boot the discrete device bumblebee works again.
Maybe other NVIDIA cards also required this in the past?
- Andreas
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I've now updated the wiki to explain that HybridGraphics is only for the
either-or laptop GPUs.
regards,
Hamish
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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1338404
Title:
probable reason for confusion:
The X/Config/HybridGraphics page in the Ubuntu Wiki does not define what
hybrid
means, and indicates that nvidia-prime is the right thing to use for multihead
workstations with both integrated and discrete video, at least by my reading of
the introduction.
...
add'l info as requested by Reporting bugs section of
https://github.com/Bumblebee-Project/bbswitch :
trusty$ dmesg | grep -C 10 bbswitch:
[ 15.775994] Bluetooth: HCI device and connection manager initialized
[ 15.776001] Bluetooth: HCI socket layer initialized
[ 15.776003] Bluetooth: L2CAP
Hamish wrote:
git://github.com/Lekensteyn/acpi-stuff.git 's acpi_dump_info.c
fails to build due to missing DEVICE_ACPI_HANDLE(), which was
removed in linux 3.13; see launchpad bug #1267437.
ok, adding this to the top of acpi_dump_info.c allows it to build.
#include linux/version.h
#if
bbswitch is a module for Optimus laptops, not desktops (except an odd,
single all-in-one). The i7-3770 is a desktop processor, so bbswitch will
not work here.
** Changed in: bbswitch (Ubuntu)
Status: Confirmed = Invalid
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: bbswitch (Ubuntu)
Status: New = Confirmed
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Have the same problem with ThinkPad W520:
# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108GLM [Quadro 1000M]
(rev a1)
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You received
$ dpkg -l | grep -i nvidia
ii bbswitch-dkms 0.7-2ubuntu1 amd64
ii libcuda1-331331.38-0ubuntu7amd64
ii nvidia-331 331.38-0ubuntu7amd64
ii nvidia-libopencl1-331 331.38-0ubuntu7amd64
ii nvidia-opencl-icd-331 331.38-0ubuntu7amd64
ii
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