Hi, I was planning to start a new bug, but I believe my bug is similar to this except that I have different symptoms.
I have a custom built media PC with a Nvidia GT 640 Rev 2 (GK208) video card. The HDMI output is connected to an Onkyo 3010 receiver which is then connected to a projector. The issue I have is that everything works up to the point where I turn off the projector (i.e., shut everything down). When that happens, I cannot get back the display. Turning the projector on just shows a blank screen which does not respond to any input. This is similar to the suspend/resume and DKMS bugs already reported except that I do not explicitly suspend or resume --- I just switch off the display (i.e. receiver). switching to a virtual console (Alt-F1) and then coming back shows a garbled display where I can't see anything clearly, but at least now I can see something. the only solution is to kill lightdm and restart the X server. I am using Trusty with XFCE. I have this bug with the trusty version of the nvidia 331.38 driver and with the xorg-edgers version of 331.38 and 334.21. The funny thing is that this used to work in Saucy. Everything was fine with the xorg-edgers 331.38 driver (I could not use the default saucy 319 driver as it would detect my video card). I've tried removing nvidia-prime, DKMS is disabled (the screen never turns on if the projector is on), and neither works. not sure what to do now. not even sure how to debug this. I was planning to attach kprobes or something to the nvidia driver to see what signals it is losing when the projector switches off. But I'm not sure how to interpret that data. This is a fairly major bug as I can't turn off the receiver anymore :-( Thanks, Raj -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers-331 in Ubuntu. https://bugs.launchpad.net/bugs/1268151 Title: DPMS support broken, fails to wake up the monitor after putting it to sleep Status in “nvidia-graphics-drivers-331” package in Ubuntu: Triaged Bug description: Also affects nvidia-graphics-drivers-319 The effect is identical to https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/958279 but with Nvidia instead of AMD/ATI drivers. HW is Dell Precision M4800 with GK106GLM [Quadro K2100M] and QHD+ display Once the display shuts off, it will not be woken up anymore and the screen stays dark. Only a restart of the Xserver will bring back the display at that point. A cycle of xset dpms force off; sleep 30; xset dpms force on will leave the display dark. At the moment I help myself by not allowing DPMS to switch off the display: neuffer@charion:~$ xset dpms 0 0 0 neuffer@charion:~$ xset -q -d :0.0 Keyboard Control: auto repeat: on key click percent: 0 LED mask: 00000000 XKB indicators: 00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off 03: Compose: off 04: Kana: off 05: Sleep: off 06: Suspend: off 07: Mute: off 08: Misc: off 09: Mail: off 10: Charging: off 11: Shift Lock: off 12: Group 2: off 13: Mouse Keys: off auto repeat delay: 500 repeat rate: 20 auto repeating keys: 00ffffffdffffbbf fadfffefffedffff 9fffffffffffffff fff7ffffffffffff bell percent: 50 bell pitch: 400 bell duration: 100 Pointer Control: acceleration: 2/1 threshold: 4 Screen Saver: prefer blanking: yes allow exposures: yes timeout: 0 cycle: 0 Colors: default colormap: 0x20 BlackPixel: 0x0 WhitePixel: 0xffffff Font Path: /usr/share/fonts/X11/misc,/usr/share/fonts/X11/100dpi/:unscaled,/usr/share/fonts/X11/Type1,/usr/share/fonts/X11/100dpi,built-ins DPMS (Energy Star): Standby: 0 Suspend: 0 Off: 0 DPMS is Enabled Monitor is On ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: nvidia-331 331.20-0ubuntu9 ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.13.1-0ubuntu1 Architecture: amd64 Date: Sat Jan 11 12:06:30 2014 InstallationDate: Installed on 2014-01-07 (3 days ago) InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016) SourcePackage: nvidia-graphics-drivers-331 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1268151/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
