An I+N machine, Lenovo ThinkPad T440p (CID 201309-14169),
could not reproduce this issue.
However,
I tested this fix by the following steps:
1. install Ubuntu 14.04.1 on Lenovo ThinkPad T440p (CID 201309-14169)
2. sudo apt-get install ubuntu-drivers-common ( to be the latest version
1:0.2.91.6)
3. sudo reboot
4. sudo apt-get install nvidia-331-updates (version: 331.38-0ubuntu7.1)
5. sudo reboot
6. sudo dkms remove bbswitch/0.7 --all
7. reboot
8. /var/log/gpu-manager.log now will tell you 'Is nvidia enabled? no'
9. enabled the proposed pocket via software center
10. sudo apt-get install ubuntu-drivers-common ( to upgrade
ubuntu-drivers-common)
11. reboot
12. /var/log/gpu-manager.log now will tell you 'Is nvidia enabled? yes'
--------------------
apt-cache policy ubuntu-drivers-common
The following is the snapshot of the test environment:
ubuntu-drivers-common:
Installed: 1:0.2.91.7
Candidate: 1:0.2.91.7
Version table:
*** 1:0.2.91.7 0
500 http://tw.archive.ubuntu.com/ubuntu/ trusty-proposed/main amd64
Packages
100 /var/lib/dpkg/status
1:0.2.91.6 0
500 http://tw.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64
Packages
1:0.2.91.4 0
500 http://tw.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
dpkg -l | grep -e nvidia -e bbsw
ii bbswitch-dkms 0.7-2ubuntu1
amd64 Interface for toggling the power on
nVidia Optimus video cards
ii nvidia-331-updates 331.38-0ubuntu7.1
amd64 NVIDIA binary driver - version 331.38
ii nvidia-libopencl1-331-updates 331.38-0ubuntu7.1
amd64 NVIDIA OpenCL Driver and ICD Loader
library
ii nvidia-opencl-icd-331-updates 331.38-0ubuntu7.1
amd64 NVIDIA OpenCL ICD
ii nvidia-prime 0.6.2
amd64 Tools to enable NVIDIA's Prime
ii nvidia-settings 331.20-0ubuntu8
amd64 Tool for configuring the NVIDIA
graphics driver
dkms status
fwts-efi-runtime-dkms, 14.08.00, 3.13.0-36-generic, x86_64: installed
nvidia-331-updates, 331.38, 3.13.0-36-generic, x86_64: installed
lsmod | grep bb (could not found anything)
ubuntu@201309-14169:~$ ls /proc/acpi/
ac_adapter battery button ibm wakeup
** Attachment added: "gpu-manager.log"
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1349282/+attachment/4202391/+files/gpu-manager.log
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to nvidia-settings in Ubuntu.
https://bugs.launchpad.net/bugs/1349282
Title:
The gpu-manager should allow RandR offloading without bbswitch
Status in “nvidia-settings” package in Ubuntu:
Triaged
Status in “ubuntu-drivers-common” package in Ubuntu:
Fix Released
Status in “nvidia-settings” source package in Trusty:
Triaged
Status in “ubuntu-drivers-common” source package in Trusty:
Fix Committed
Bug description:
SRU Request
While bbswitch may fail on some hybrid systems (e.g. on the desktop or
when the bbswitch module fails to build), this is not a good reason to
prevent the system from offloading rendering to the NVIDIA GPU.
[Impact]
* This problem makes it impossible to use the NVIDIA GPU on hybrid systems
with Intel+NVIDIA GPUs when bbswitch is not available (i.e. when it fails to
load).
[Test Case]
* Make sure to be using a hybrid system with Intel+NVIDIA GPUs.
* Check that bbswitch is not available. You can do so by posting output of
the following command:
test -e /proc/acpi/bbswitch && echo true || echo false
* Make sure that the gpu-manager is not disabled (only necessary if you
disabled it manually).
* Install ubuntu-drivers-common from trusty-proposed.
* Remove all fglrx and nvidia drivers (keep the nvidia-common and the
nvidia-prime packages):
sudo apt-get --purge remove nvidia-331
sudo apt-get --purge remove nvidia-331
sudo apt-get --purge remove fglrx
sudo apt-get --purge remove fglrx-updates
* Restart the system.
* Install the nvidia binary driver, reboot, and check that the binary driver
is enabled (attach your /var/log/gpu-manager.log)
- Expected: the NVIDIA discrete GPU is enabled.
- Bad behavior: the system switches back to the intel driver and the
discrete GPU is not used, despite the fact that the system was configured
properly.
[Regression Potential]
* Low. Systems that currently work will keep working as usual, the ones that
currently fail should finally work.
[Other Info]
* N/A
-----------
The gpu-manager should allow RandR offloading without bbswitch. This
would allow desktop systems to make use of offloading even when
bbswitch is not supported.
Also, nvidia-settings should not complain in such scenarios. See
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-
common/+bug/1310023/comments/70
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nvidia-settings/+bug/1349282/+subscriptions
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