Here is the apport report. Apport-bug is broken in kubuntu 15.04 so I manually attached this one got from apport-bug
** Attachment added: "1455870.apport" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1455870/+attachment/4398773/+files/1455870.apport -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1455870 Title: Suspend to RAM freeze when wawking up with linux image 3.19.0-16 Status in linux package in Ubuntu: Incomplete Bug description: Hi all, I noticed with my laptop samsung r525 running a fresh install of kubuntu 15.04 that if I close the screen, the computer goes to suspend to RAM but when I try to wake it up, the computer starts again but the screen does not turn on. Nothing is displayed and the screen remains turned off, including backlights (this is diferent from having backlights on again a blackscreen displayed on screen). I can reproduce the same behaviour by using the pm-suspend command from shell, or clicking "suspend to ram" into the exit menu. If I boot from the 3.19.0-15 kernel, everything works properly. I tried another kernel picked up from here http://kernel.ubuntu.com /~kernel-ppa/mainline/?C=N;O=D following this wiki page https://wiki.ubuntu.com/Kernel/MainlineBuilds?action=show&redirect=KernelMainlineBuilds (respectfully the v4.1-rc3-unstable and v4.1-rc2-vivid and I got the same problem each time. What is going wrong ? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1455870/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
