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I also have the problem with the blank screen after monitor power cycle. #Amd firepro w4100 3 monitors error upgrade#UpgradeStatus: No upgrade log present (probably fresh install) Package: xfce4-power-manager 1.2.0-3ubuntu4 LiveMediaBuild: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) This issue does not occurs on another computer (with nVidia gfx card+Dell U2713HM+DVI cable) The monitor is connected with a displayport cable.Įnable or disable the displayport 1.2 setting of the monitor doesn't change anything. My graphics card is Intel HD4600 and my monitor is Dell UP3214Q. I tried xset dpms force off/suspend/ standby, the monitor works fine after resuming. This never happened on 13.10.īooting from xubuntu 14.04 livecd or a clean installion of xubuntu 14.04 gives the same problem. I have to restart x to bring it back to work. When I turn the monitor off and on, it only shows "no input signal".
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