Dell P2715Q Display with iMac

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  2. 5 weeks ago

    Dave S

    Aug 18 San Diego, California USA

    I am about to get a 2017 27" 5k iMac, and just ordered two adapters from Cable Matters (not the same as the OP, as I will have T3 ports not T2)... And will be using them to connect two Dell 1905FP monitors (which are only 1280x1024)..... so I sure hope they work

  3. David S

    Aug 18 Pre-Release Testers, Xojo Pro

    The monitor I have is great except for that occasional reboot.

  4. Emile S

    Aug 18 Europe (France, Strasbourg)

    Have you tried to Power ON the external Monitor after the iMac Boot is over ?

  5. David S

    Aug 18 Pre-Release Testers, Xojo Pro

    @Emile S Have you tried to Power ON the external Monitor after the iMac Boot is over ?

    I have no problems during boot, only after waking from a deep sleep.
    If I set the iMac not to sleep, or turn off the external display before the iMac goes to sleep, the problem seems to be avoided.
    Unfortunately, this problem is intermittent. For the most part, the iMac wakes with the two displays OK - but then there is that one time, usually when I need to access the iMac remotely, that the crash occurs.

  6. Sam R

    Aug 18 Pre-Release Testers, Xojo Pro Hengchun, Pingtung, Taiwan

    I get this problem occasionally with a Apple TBD and a MacBook Pro; without the display attached the MacBook Pro will wake correctly; with it connected theres always the chance that the machine won't wake up properly (Kernel Panics galore).

  7. Paul F

    Aug 18 Pre-Release Testers, Xojo Pro Europe, Cambridge

    I also have this problem running a MacBook Pro and an LG 34inch widescreen monitor. It hasn't happened recently but used to occur about once a week. Very strange!

  8. Beatrix W

    Aug 18 Pre-Release Testers Europe (Germany)

    Same here with a Dell monitor. Happened both for my old MacPro and the new Hackintosh. The monitor now isn't allowed to sleep.

  9. Jean-Yves P

    Aug 18 Pre-Release Testers, Xojo Pro Europe (France, Besancon)

    @David S Unfortunately, I don't have another display.

    exchange your monitor temporarly with friend or work, if you kindly ask no one can refuse.

  10. Dave S

    Aug 19 San Diego, California USA

    @Jean-YvesPochez , if you kindly ask no one can refuse.

    You don't know Americans very well do you? :D

  11. 4 weeks ago

    David S

    Aug 24 Pre-Release Testers, Xojo Pro

    Does anybody know of a monitor that works well? I may just buy it and see how things work. Staples, for example, has a 14-day return policy - so I can return it if the same this happens.

  12. Mattias S

    Aug 24 Pre-Release Testers, Xojo Pro Europe (Sweden, Stockholm)

    Exactly the same problem with that monitor but with a HP EliteBook 840.
    Windows 10 doesn't recognize the monitor when waking from sleep and I have had to disable sleep entirely. Connected using DisplayPort directly from the laptop. Doesn't happen when using HDMI but then I only get 30Hz refresh rate. With DP I get 60 Hz.

  13. Jean-Yves P

    Aug 24 Pre-Release Testers, Xojo Pro Europe (France, Besancon)

    Philips Brilliance B-line 26'' USB-C
    ref 258B6QUEB/00
    has all connectors you can dream of, from vga to usb-c direct connexion.

  14. Emile S

    Aug 24 Europe (France, Strasbourg)

    @Mattias Söm Doesn't happen when using HDMI but then I only get 30Hz refresh rate. With DP I get 60 Hz.

    Are-you able to see a difference between the two refresh modes ?

  15. Julian S

    Aug 24 Pre-Release Testers, Xojo Pro UK

    I have a Dell UP3214Q, it has a similar issues, no signal when bringing the screen out of power saving, sometimes half a panel when turning on. I sold my trashcan a while back and went back to windows so my computer doesn't suffer from not turning on any more. My bro's monitor does the same, I think Dell dropped the ball on this chipset. They claimed to have fixed it in a new firmware (which I have) but it hasn't. I can live with it, happens maybe once a week.

    @Emile S Are-you able to see a difference between the two refresh modes ?

    Between 30Hz and 60Hz? When I mis-configure my monitor and put it into 30Hz its like night and day, I can tell the different with just the mouse refresh speed, let alone window movement refresh speed.

  16. Mattias S

    Aug 24 Pre-Release Testers, Xojo Pro Europe (Sweden, Stockholm)

    @Emile S Are-you able to see a difference between the two refresh modes ?

    Oh yes - dragging windows and moving the mouse clearly shows the difference.

  17. Mattias S

    Aug 24 Pre-Release Testers, Xojo Pro Europe (Sweden, Stockholm)

    @Julian S I can live with it, happens maybe once a week.

    The pain is that I need to reboot the system since the display scaling on Windows sucks and force me to reboot to be restored when the monitor took a too long nap. The hassle or shutting down virtualbox and restarting everything is a PITA.

  18. Mattias S

    Aug 24 Pre-Release Testers, Xojo Pro Europe (Sweden, Stockholm)

    Investigating further, I have found that the Dell UltraSharp U2515H in my home-office seems to be compatible with my laptop and sleep. It was bought just a couple of months ago, but since the monitor in my office doesn't work reliably I haven't bothered testing it on my home-office monitor until now.
    @Julian S - do you know how to check the firmware?

  19. Julian S

    Aug 25 Pre-Release Testers, Xojo Pro UK

    @Mattias Söm @Julian S - do you know how to check the firmware?

    http://jmswrnr.com/blog/the-firmware-issues-of-dell-up3214q-and-up2414q-a00-monitors/

    I'm not sure what information is shown on your diagnostic menu as your monitor is a different version, just map the button controls to their respective positions on your monitor and you should be able to view the diag screen.

  20. Mattias S

    Aug 25 Pre-Release Testers, Xojo Pro Europe (Sweden, Stockholm)

    @Julian S view the diag screen.

    Thanks. Rev A03 from December 2015.

  21. last week

    David S

    Sep 12 Pre-Release Testers, Xojo Pro

    I just wanted to report a solution to this problem:

    I have been dealing with an issue where my iMac Retina 2014 would freeze with a black screen and require a reboot after a deep sleep. This has been going on for about 1 to 2 years now and I believe continued from El Capitan to the current version of Sierra (10.12.6). The problem may have either began after an OS upgrade or when I added a second monitor, a Dell P2715Q.

    The iMac seemed to work fine all day. The problem would occur after leaving the computer for long periods of time, usually overnight, and would also may remote access difficult to impossible unless I set the System Preferences:Energy Saver:Turn display off after: to Never.

    Since there were many issues about the Dell monitor found online, I was thinking this was the issue and tried every issue I could find online with no luck, including PRAM reset, SMC reset, reinstall OS.

    The problem turned out to be iCloud. I signed off of iCloud in the System Preferences and have not had the problem since.

    I am guessing when I upgraded the OS, it asked me to sign in to iCloud, and that's when all the problems began.

    I am not sure if there is some way to use iCloud or change an iCloud setting to allow this to work, but at least now, all is well. My computer has not crashed, I can log in remotely, and all seems stable.

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