The fix may be in kernel 3.19.0-25.26. I did build and install this kernel and in subsequent stress testing (about 2 hours worth) was unable to reproduce the defect. It's rare for me to not encounter the defect in less than 5 minutes of stress testing - might have once made it to about 20 minutes - but never before to two hours. I'm not ready to call it fixed though just yet.
To begin with I would like to get using an official build of the kernel. As previously noted I was unable to install the 14.04.3 HWE stack that contains this kernel. Here is the command I ran and the problems encountered: sudo apt-get install --install-recommends linux-generic-lts-vivid xserver-xorg-core-lts-vivid xserver-xorg-lts-vivid xserver-xorg-video- all-lts-vivid xserver-xorg-input-all-lts-vivid libwayland-egl1-mesa-lts- vivid Reading package lists... Building dependency tree... Reading state information... Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: libcogl15 : Depends: libegl1-mesa-drivers libwayland-egl1-mesa-lts-vivid : Depends: libegl1-mesa-lts-vivid (= 10.5.2-0ubuntu1~trusty1) but it is not going to be installed Conflicts: xorg-renamed-package-lts-utopic xserver-xorg-core-lts-vivid : Depends: libgbm1-lts-vivid (>= 8.1~0) but it is not going to be installed Recommends: libgl1-mesa-dri-lts-vivid (>= 7.10.2-4) but it is not going to be installed Conflicts: xorg-renamed-package-lts-utopic xserver-xorg-input-all-lts-vivid : Depends: xserver-xorg-input-evdev-lts-vivid but it is not going to be installed Depends: xserver-xorg-input-vmmouse-lts-vivid but it is not going to be installed Depends: xserver-xorg-input-synaptics-lts-vivid but it is not going to be installed Depends: xserver-xorg-input-wacom-lts-vivid but it is not going to be installed xserver-xorg-lts-vivid : Depends: xserver-xorg-input-evdev-lts-vivid but it is not going to be installed Recommends: libgl1-mesa-dri-lts-vivid but it is not going to be installed Recommends: libgl1-mesa-glx-lts-vivid but it is not going to be installed Recommends: libegl1-mesa-lts-vivid but it is not going to be installed Recommends: libegl1-mesa-drivers-lts-vivid but it is not installable Recommends: libgbm1-lts-vivid but it is not going to be installed Recommends: libgles2-mesa-lts-vivid but it is not going to be installed Recommends: libgles1-mesa-lts-vivid but it is not going to be installed Conflicts: libegl1-mesa (>= 0~) Conflicts: libgl1-mesa-dri (>= 0~) Conflicts: libgl1-mesa-glx (>= 0~) Conflicts: libglapi-mesa (>= 0~) Conflicts: libgles2-mesa (>= 0~) Conflicts: xorg-renamed-package-lts-utopic xserver-xorg-video-all-lts-vivid : Depends: xserver-xorg-video-ati-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-cirrus-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-fbdev-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-intel-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-mga-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-neomagic-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-nouveau-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-openchrome-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-savage-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-siliconmotion-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-sisusb-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-tdfx-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-trident-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-vesa-lts-vivid but it is not going to be installed Depends: xserver-xorg-video-vmware-lts-vivid but it is not going to be installed E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. I suppose I could just install the kernel - but I think it would be better if I can keep the core system in sync with the LTS releases. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1437719 Title: [Dell Inspiron 5547] Black Screen on user switch To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1437719/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp