I don't think the monitor ever worked correctly in Linux in this regard. It is a couple years old. It is still under warranty, but Dell says they won't help since it might involve Linux. It does appear to work correctly under Windows 10 from the limited testing I did. Since this is the case it should be possible to make it work with Linux. That being said if it was possible to demonstrate some aspect of it is flawed under Windows then I suspect they might help.
Where are the sleep logistics handled? Is it with the X server, the NVIDIA drivers, the Linux Kernel, or somewhere else? Is it possible to capture the communications on Windows 10 to identify how it is being handled. I don't get the feeling it should be that complex to fix or at least implement a work around since xrander is able to bring the monitor back online. ______________________________________________________ When was this purchased? What is its date of manufacture? Did it ever work right with any Linux distro or kernel? Any chance you can still return it to vendor? I suspect this may well be a problem with no other solution. https://www.newegg.com/Product/Product.aspx?Item=N82E16824260115 reviews indicate I'm not the only one with DisplayPort sleep mode trouble with a Dell display. My Dell U2913WM behaves as expected, unless connected via DisplayPort. When connected to my Dell DisplayPort-equipped PCs via DisplayPort, it absolutely must be powered up before turning on the PC. Otherwise, it stays in sleep mode indefinitely. I managed to get Dell to replace it next day on my first phone call, but eventually Dell refused further help because my Dell /PCs/ were "out of support". -- "The wise are known for their understanding, and pleasant words are persuasive." Proverbs 16:21 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/
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