<html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi Nino, Canonical recommends using the 'do-release-upgrade' command. Depending on how much you have to back up on this system and the capacity of your backup devices, it might not be a bad idea to do a clean install. In that case, ___after you've backed up your system___, go to the xubuntu website and download the amd64 image of 16.04. Burn it to a DVD using the xfburn or brasero image option. You might want to use DBAN and blank the drive before installing 16.04. Jordan <div class="moz-cite-prefix">On 05/18/2016 06:21 PM, pereira wrote: </div> <blockquote cite="mid:573CEAF2.5000003@gmail.com" type="cite">HI Jordan, thank you for the update, and the comment on 16.04. I'll try those, hoping for the best. It's as simple as 'sudo apt-get dist-upgrade, correct? and tehn pray? Nino On 05/18/2016 06:17 PM, JMZ wrote: <blockquote type="cite">Hi Nino, There is a later driver upgrade for nvidia cards, nvidia-361, in the repositories. in terminal try: sudo apt-get update && sudo apt-get install nvidia-361 sudo reboot, and see if the new driver provides the resolution that you'd like. *** Unlike other commenters in the thread, I don't see why an upgrade to 16.04 would be undesirable. I'm running 16.04 on my system. I haven't had any problems, save one broken dependency which later resolved itself during an automatic update. If you're confident with terminal commands, you should be able to fix the odd broken dependency if one even appears. Jordan On 05/18/2016 02:07 PM, pereira wrote: <blockquote type="cite">Jordan, FYI I got a videocard specifically to support this system, a GeForce GTX 960; the driver is 352.79. According to the specs, this card supports the monitor that I can tell. I don't know the differences between the drivers. Nino On 05/18/2016 10:22 AM, JMZ wrote: <blockquote type="cite">Hi Nino, which videocard are you using? Is it an integrated video chip system (ie. intel), or a video card in the video graphics slot? Maybe two scenarios are possible. 1) Perhaps your video card does not fully support display port at that resolution. In that case you will need a new video card capable of this task. If you are using an integrated graphics system, now might be the time to get an external graphics card suited to the setup you would like to have. 2) Perhaps your drivers are old, and not supportive of what you'd like to do. Certain drivers, like the nvidia series, are available by repository and are frequently updated. Others might be available by ppa (search sourceforge for a possible ppa). Good luck, Jordan On 05/17/2016 09:38 PM, pereira wrote: <blockquote type="cite">Hi All, I got myself qn ASUS PB287Q 4 k monitor with 3840x2160 pixels, which I'm using together with an older but still nice ACER X243W 1920x1200 monitor. The ASUS can connect through a displayport, which allows it to refresh at a 60 Hz rate, and an HDMI port which allows only 30 Hz (apparently). The problem is: the connection through a displayport is plug-and-play (I've been told), so that my computer Xubuntu 14.10) notices that something is amiss, and it switches over to the remaining screen. Something similar happens when I forget to log out: tihe system hits some timeout, the monitor turns off, and the display goes to the smaller screen. I could decide to use the HDMI connection, but then the mouse crawls across the screen with little jumps, a very irritating sight. I could perhaps connect through a second HDMI connection to speed things up. But, what I'd wonder about is: can you turn off the plug-and-play thingie so that things stay alive the way I like them? Any other suggestion for getting this monitor under control? Thank you, Nino </blockquote> </blockquote> </blockquote> </blockquote> </blockquote> </body> </html>