Public bug reported:
Description:
When running 2 Nvidia video cards Xinerama is needed to seamlessly span
all screens. When Xinerama is enabled this causes the panel to turn
black and the 'dash' start flickering. Several screen shots are included
Steps to reproduce:
1) Install nvidia drivers (nvidia-current or nvidia-current-updates or
drivers from Nvidia site)
2) Run nvidia-settings and enable all monitors on video cards
3) Enable xinerama using nvidia-settings
4) Log out or reboot. Log in, click on dash and symptoms will start.
Note:
This couldn't be tested using the nouveu drivers due to it not properly
handling full resolution on a single monitor.
Hardware:
Nvidia NVS 510
Version affected:
Precise
ii libxinerama1 2:1.1.1-3build1
X11 Xinerama extension library
ii unity 5.18.0-0ubuntu1
Interface designed for efficiency of space and interaction.
ii linux-image-generic 3.2.0.34.37
Generic Linux kernel image
ii nvidia-common 1:0.2.44.2
Find obsolete NVIDIA drivers
ii nvidia-current 295.40-0ubuntu1.1
NVIDIA binary Xorg driver, kernel module and VDPAU library
ii nvidia-settings 295.33-0ubuntu1
Tool of configuring the NVIDIA graphics driver
** Affects: unity (Ubuntu)
Importance: Medium
Status: New
** Affects: unity (Ubuntu Precise)
Importance: Medium
Status: New
** Attachment added: "unity-xinerama-bug-screenshots.tar"
https://bugs.launchpad.net/bugs/1096954/+attachment/3476210/+files/unity-xinerama-bug-screenshots.tar
** Also affects: unity (Ubuntu Precise)
Importance: Undecided
Status: New
** Changed in: unity (Ubuntu Precise)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1096954
Title:
Enabling Xinerama causes Unity Panel/Dash to become all black
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