display – TechUtils.in

June 12, 2019

#StackBounty: #multiple-monitors #display #display-resolution #xrandr Portable monitor past monitor edges

Bounty: 50

I have an Asus monitor for a 2016 XPS 13 developer edition laptop. I’ve been trying to get the resolution to look better than the defaults. I ran the following xrandr commands:

xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
xrandr --addmode DVI-I-1-1 "1920x1080_60.00"

Afterwared I changed the settings in the GUI manager. The screen looks much better but the edges overflow past the monitor edges. Is there a good way to fix this? The monitor I am using is:

https://www.amazon.com/ASUS-MB169B-1920×1080-Portable-Monitor/dp/B00FE690DI/ref=sr_1_3?keywords=portable%2Bmonitor&qid=1560014011&s=gateway&sr=8-3&th=1

Edit: I forgot to mention that I am running Ubuntu 19.04.

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June 5, 2019

#StackBounty: #kubuntu #multiple-monitors #display #plasma-5 Kubuntu display issues on DVI monitor

Bounty: 50

I am having issues getting my second display to work properly in my latest install (Kubuntu 19.04). When I originally installed it, it would ask me (on startup) how to handle secondary display (don’t remember the exact dialog, but it asked about mirroring, or extending etc…) But my secondary display showed properly.

Now, for some reason, as you can see, image 1 is my hdmi output (works fine), and image 2 is the DVI monitor. The pictures actually make it seem better than it is. It’s basically unusable. Fonts and small things (like icons and cursors) are the worst.

It almost looks like it can’t anti-alias?

I’ve tried switching displays, it’s not the monitor itself. swapping the cord causes the other monitor to do it. I’ve tried different cords also, same result. I would imagine it has to be my video card somehow, but I’ve not made any changes to it, or my configuration since I first built the machine (like a year ago). Have been using Windows mainly for the last little while, and decided to give Linux another go as my primary, and just VM to Windows when I need it.

When installing Kubuntu via my live usb, the display was fine. Seems to only affect the installed os.

xrandr output:

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00 +  74.97*   50.00    59.94  
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1366x768      59.79  
   1280x800      60.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    60.00    59.94  
   720x400       70.08  
DVI-D-0 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00 +  74.97*   50.00    59.94  
   1680x1050     59.88  
   1600x1000     60.01  
   1440x1080     59.99  
   1400x1050     59.95  
   1280x1024     75.02    60.02  
   1440x900      60.00  
   1280x960      60.00  
   1280x800      60.00  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08

If I switch the display to the next highest resolution (1680×1050), it also looks fine, but I would much prefer to have both monitors on the same resolution.

There has to be some system configuration, because it’s fine in Windows, and it’s fine in the Linux Live environment.

Video card, if it ends up relevant is Radeon RX 550 640SP / RX 560/560X according to lspci | grep HDMI

(You’ll see plain ubuntu in the screenshot, that’s a vnc to another machine on my network, and took the best photos)

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May 24, 2019

#StackBounty: #display Monitor power blinking but no display

Bounty: 50

I have a Samsung SyncMaster 943NW that I found in my storage room and it worked perfectly fine for a few months until now, when I turn on the monitor it has no display and the power light is blinking.

The LED usually don’t blink and when there’s nothing connected to the monitor there will be something popping up but there’s nothing there.

I tried unplugging the power and signal cable and put it back on but it still has the same problem.

How can I fix it?

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April 9, 2019

#StackBounty: #laptop #display #multiple-monitors #resolution #hp-spectre Dell dual monitor is unstable with my HP laptop

Bounty: 50

At work, I have a Dell monitor as a dual screen in addition to my HP Spectre laptop screen.

I have a Dell hub that has the monitor, ethernet, mouse and keyboard as inputs, and then this connects to my laptop via USB.

For the most part it works fine, but there is some strange behaviour regarding the monitor. I will try to describe some of the weird things and see if anyone has any idea of a fix.

Firstly, when I take my laptop home and use it alone, I always have to adjust the screen resolution so it looks okay. No problem.

When I use it again the next day at work:

Sometimes the laptop screen comes on and the monitor remains black.
When I go to display settings, sometimes the Dell monitor appears as a display and sometimes it does not. Sometimes it will appear and then disappear and then reappear, every 10 seconds or so.

Sometimes the Dell monitor will be black for a few minutes and then it will just turn on, and everything will look fine.

Sometimes when the system does recognise the Dell monitor, it will have swapped its position with respect to my laptop screen (i.e. the system thinks I have to move my mouse to the right to appear on the Dell monitor, which is actually to the right).

Quite often, I just restart a bunch of times, and on the (say) third time, it will be okay.

I don’t think there are any loose connections because:

Once the monitor is on and appearing fine, it stays like that all day – even if I move it around.
As I said, sometimes, restarting fixes it, even when I don’t touch any cables.

It just seems that my system can’t quite figure out when resolution / how many monitors and it seems to sometimes jump around between two states trying to figure it out. It usually takes me between 10 and 30 minutes to get it stable each morning, and I don’t even really know what is working. I just restart and change resolution and mess around with anything until it decides it is happy.

I don’t know where to start looking for a fix so if anyone can point me in the right direction that would be great thank you.

UPDATE:

Now the Dell monitor never comes on at all – it doesn’t seem to be recognised. Like I said, I’m pretty sure it’s a software issue rather than a connection problem.

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March 24, 2019

#StackBounty: #xorg #multiple-monitors #display #xrandr #xset How to standby a monitor using xset in multi monitor setup?

Bounty: 100

While having two or more monitor working together, Is there any way to put a single one of them on standby/suspend by issuing a command like: xset dpms force suspend? or having a time set for that purpose like: xset dpms 100 0 0 which works on these monitors separately?

I’ve got two monitor working along each other, eDP1 (My Laptop) and VGA1 (An External monitor).

I want each of them to go into suspend/standby mode separately if I’m not directly interacting with them, suppose I’m watching a movie on VGA1, and for an hour and half eDP1 is on doing nothing.

I’m not interested in using xrandor --off --output eDP1 because it’s not fast enough to work with.

I want my monitor to be ready to work, with a simple mouse movement so I’m able to switch between them fast.

Running: Ubuntu 18.04
Window Manager: OpenBox

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March 12, 2019

#StackBounty: #login #multiple-monitors #display #lightdm #display-resolution How to fix login screen (lightdm) orientation and prompt …

Bounty: 50

I have Ubuntu MATE 16.04.6 LTS installed on a system with two monitors.
They act normally when I login to default MATE 1.12.1 session.

But the LightDM login screen looks weird on both screens:

1600×900 normal landscape rotation
1280×1024 left portrait rotation

Details about lightdm:

$ dpkg -l | grep -i lightdm
ii  liblightdm-gobject-1-0:amd64   1.18.3-0ubuntu1.1  amd64  LightDM GObject client library
ii  lightdm                        1.18.3-0ubuntu1.1  amd64  Display Manager
ii  lightdm-gtk-greeter            2.0.1-2ubuntu4     amd64  simple display manager (GTK+ greeter)
ii  lightdm-gtk-greeter-settings   1.2.1-0ubuntu1     all    settings editor for the LightDM GTK+ Greeter
ii  ubuntu-mate-lightdm-theme      16.04.7            all    LightDM theme and default configuration for Ubuntu MATE

$ cat .dmrc 
[Desktop]
Session=mate

I see this on every boot-up and currently I enter my password blindly.

How and where should I fix this problem?

Update: passing nomodeset in GRUB fixes LightDM login, but disables screen rotation of right monitor.

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February 25, 2019

#StackBounty: #display #multiple-monitors Why is my vertical monitor's viewport much smaller than it should be?

Bounty: 50

I have two 1920 x 1080 monitors, one horizontal and one vertical. When visiting this viewport measuring site on on my horizontal one it says 1920 × 947 which is normal. On my vertical one though it says 864 x 1403.

The viewport width is over 200 pixels smaller than it should be! I see no visual clue that could explain such a weird phenomenon: Chrome window correctly fills the screen, the web pages are complete, etc.

Below is a screenshot taken from another site that measures viewport width that shows both the viewport width (847px) calculated by that particular website, and the actual width of the screen as indicated by my screenshot app (1058px).

This looks like black magic. If anybody has the slightest clue please come forward!