I'm experiencing this bug after upgrading from kubuntu 14.10 to 15.04
using the update manager.
Using nvidia-346:
Booting with a previous kernel (3.16) works but I'm stuck in intel mode.
Booting with current kernel (3.19) leaves me with the black screen which can be
fixed (until restart) by running the suggested:
sudo systemctl stop sddm
sudo systemctl start gpu-manager
sudo systemctl start sddm
Idk if its relevant but
gpu-manager.conf :
start on (starting lightdm
or starting gdm
or starting kdm
or starting xdm
or starting lxdm)
task
exec gpu-manager --log /var/log/gpu-manager.log
Tried the obvious and added a line "or starting sddm" but didn't work :P
** Attachment added: "dpkg -s ubuntu-drivers-common.txt"
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1443364/+attachment/4383102/+files/dpkg%20-s%20ubuntu-drivers-common.txt
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https://bugs.launchpad.net/bugs/1443364
Title:
gpu-manager systemd unit is not enabled
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