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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1268151 Title: DPMS support broken, fails to wake up the monitor after putting it to sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1268151/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
