So some may already know I have displayport issues.
I decided to look into it again to see if I can fix the problem.
As a recap here is the problem.
Turn monitor and PC on with displayport cable in place.
Everything works fine providing the monitor is not manually turned off, by this I mean pressing the power button on the monitor.
If the monitor is manually turned off then when its turned on again no signal is detected. This happens in every OS, and in the BIOS.
If windows is running (but not in safe mode), removing the displayport cable from the gpu and putting it back in again after the monitor is turned back on will bring the signal back up.
If windows is in safe mode, or using linux, or in the bios, removing the cable and putting it back does not wake up the signal. In this case one has to reboot the computer.
I have 3 different DP cables same problem, I only have one DP monitor.
Recently I read hot plug detection causes this type of problem and discovered that in the service menu on my monitor I can disable HDP which I did, but sadly this has no affect on the problem. One of the strangest issues I have come across in computing, but shows to me that DisplayPort is an overly not matured enough technology and why DVI should still exist on 200 series graphics cards.
Its very likely the monitor is glitching out somewhere given 3 different cables and now 3 different gPUs exhibit the problem, but I am not buying a new monitor to diagnose it, but seems as long as I am using this monitor (probably for several more years) I wont be using displayport.
The following work ok.
1 - If configure the monitor to auto standby in its OSD settings e.g. after 10 minutes enter standby mode, it will wake up, also whilst its in standby if you power it off, it will still wake up fine.
2 - If you tell the display output from windows to sleep using something like LCDoff then it will also wake up fine, and again if you power off the monitor manually after this it also turns back on fine.
I decided to look into it again to see if I can fix the problem.
As a recap here is the problem.
Turn monitor and PC on with displayport cable in place.
Everything works fine providing the monitor is not manually turned off, by this I mean pressing the power button on the monitor.
If the monitor is manually turned off then when its turned on again no signal is detected. This happens in every OS, and in the BIOS.
If windows is running (but not in safe mode), removing the displayport cable from the gpu and putting it back in again after the monitor is turned back on will bring the signal back up.
If windows is in safe mode, or using linux, or in the bios, removing the cable and putting it back does not wake up the signal. In this case one has to reboot the computer.
I have 3 different DP cables same problem, I only have one DP monitor.
Recently I read hot plug detection causes this type of problem and discovered that in the service menu on my monitor I can disable HDP which I did, but sadly this has no affect on the problem. One of the strangest issues I have come across in computing, but shows to me that DisplayPort is an overly not matured enough technology and why DVI should still exist on 200 series graphics cards.
Its very likely the monitor is glitching out somewhere given 3 different cables and now 3 different gPUs exhibit the problem, but I am not buying a new monitor to diagnose it, but seems as long as I am using this monitor (probably for several more years) I wont be using displayport.
The following work ok.
1 - If configure the monitor to auto standby in its OSD settings e.g. after 10 minutes enter standby mode, it will wake up, also whilst its in standby if you power it off, it will still wake up fine.
2 - If you tell the display output from windows to sleep using something like LCDoff then it will also wake up fine, and again if you power off the monitor manually after this it also turns back on fine.