Hello! I'm trying to get a 2560x1440 monitor to use full resolution (currently it only displays at 1920x1080) but when I try installing video drivers via `sudo apt-get install xserver-xorg-video-all` or `sudo apt-get install xserver-xorg-core` it says it wants to remove a package called `neon-desktop` which sounds bad. Is `neon-desktop` safe to remove?

You do not want to remove the 'neon desktop' package.

Have you installed the nvidia driver? If not install the package 'kbuntu-driver-manager' and install it via this.

Thanks, finally figured out how to log back in here to reply.

I don't have any nvidia drivers installed.

What's this kubuntu-driver-manager all about? I installed it but it doesn't seem to give me the ability to install new drivers.

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$ sudo lshw -c video
   description: VGA compatible controller
   product: 3rd Gen Core processor Graphics Controller
   vendor: Intel Corporation
   physical id: 2
   bus info: pci@0000:00:02.0
   version: 09
   width: 64 bits
   clock: 33MHz
   capabilities: msi pm vga_controller bus_master cap_list rom
   configuration: driver=i915 latency=0
   resources: irq:28 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:4000(size=64) memory:c0000-dffff


I've spent several hours trying to get this to work... not by installing drivers, as `apt-get install xserver-xorg-video-all` wants to remove 'neon-desktop' (why?!) but by using xrandr as described here viewtopic.php?f=309&t=141545#p380311. Following those steps with `cvt` and `xrandr` I'm able to create the proper resolution size, but when I select it in KDE's Settings>Display it won't take effect, it just resets back to what was previously selected. ...Does that sound like a driver issue?

Sorry I had assumed that you had a nvidia graphic card. I have no experience of intel graphics.

I don't know if you are familiar with using ppa's but there is one here that may be of use:

https://launchpad.net/ubuntu/+source/xs ... ideo-intel

the driver for your Intel graphics "i915" is the correct one for your chip .....and is usually quite good .

this sounds more like the monitor it's self not reporting the correct "as linux is concerned" EDID or you have a "slightly" bad cable .

You can also install the "read-edid" package and discover if, in fact, your EDID is readable and correct.

VINNY

Well testing "edid" is deeper than I've gone previously so I'm not sure how to interpret this... The edid output does not list the 2560x1440 dimensions... I did:

1) sudo get-edid -b 4 | parse-edid | tee edid-bus4.txt
2) run through `cvt` and `xrandr` steps previously mentioned
3) sudo get-edid -b 4 | parse-edid | tee edid-bus4_after.txt

...but they're identical. The cvt & xrandr commands did not change the edid output. Here's what edid commands gave:

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Section "Monitor"
   Identifier "BenQ GW2765"
   ModelName "BenQ GW2765"
   VendorName "BNQ"
   # Monitor Manufactured week 32 of 2014
   # yup, I've had this for three years and have never had it working at full resolution :(
   # EDID version 1.3
   # Digital Display
   DisplaySize 600 340
   Gamma 2.20
   Option "DPMS" "true"
   Horizsync 30-89
   VertRefresh 50-76
   # Maximum pixel clock is 270MHz
   #Not giving standard mode: 1280x1024, 60Hz
   #Not giving standard mode: 1280x720, 60Hz
   #Not giving standard mode: 1280x800, 60Hz
   #Not giving standard mode: 1600x900, 60Hz
   #Not giving standard mode: 1680x1050, 60Hz
   #Not giving standard mode: 1920x1080, 60Hz

   #Extension block found. Parsing...
   Modeline    "Mode 16" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
   Modeline    "Mode 0" 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync
   Modeline    "Mode 1" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
   Modeline    "Mode 2" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync
   Modeline    "Mode 3" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace
   Modeline    "Mode 4" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace
   Modeline    "Mode 5" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync
   Modeline    "Mode 6" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
   Modeline    "Mode 7" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
   Modeline    "Mode 8" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
   Modeline    "Mode 9" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
   Modeline    "Mode 10" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace
   Modeline    "Mode 11" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace
   Modeline    "Mode 12" 25.200 640 656 752 800 480 490 492 525 -hsync -vsync
   Modeline    "Mode 13" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
   Modeline    "Mode 14" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
   Modeline    "Mode 15" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
   Modeline    "Mode 17" 74.25 1920 2008 2052 2200 540 542 547 562 +hsync +vsync interlace
   Modeline    "Mode 18" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
   Modeline    "Mode 19" 27.00 720 736 798 858 480 489 495 525 -hsync -vsync
   Option "PreferredMode" "Mode 16"
EndSection


So like I said, I'm unsure how to interpret this. Can any conclusion be drawn from this information? Or are there other places I should dig around to uncover other information?

@Vinny suggest the cable might be the problem... does this information confirm/negate that? It's the HDMI cable that came with the monitor... now that I write this it makes me doubt the cable is the problem... though perhaps the HDMI-MiniDP adapter could be the problem? It's an audioquest (no model) that I must have purchased when I got the monitor. I see the resolution advertised with adapters they're currently selling, but haven't seen an info on this one from a few years ago.