Q4OS Forum

Adam33

Member

Registered: 2019-03-21

Posts: 33

Issue with UHD Monitor

I recently purchased a UHD (4K) monitor, and while I've found support for scaling better than expected, it doesn't seem there is any support for adjusting the actual resolution to a lower value, nor is there support for rotating the screen. The monitor itself does support these options, but I can't find any mechanism in Q4OS to do this. The "Monitor & Display" configuration provides only one option, the native (maximum) resolution and the standard orientation. It cannot be raised or lowered, at least not via the UI.

Any way to adjust this?

Thanks!

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 4,501

Website

Re: Issue with UHD Monitor

We would recommend you to use the "tderandrtray" utility. It provides resolution settings as well as rotation and other adjustments.

Adam33

Member

Registered: 2019-03-21

Posts: 33

Re: Issue with UHD Monitor

I tried the tray utility as well. There was only the one default option and no others.

It had the option to open the same "Monitor & Display" window I described earlier which gives an error any time anything is checked or unchecked in there, "xrandr: Failed to get size of gamma for output default."

Adam33

Member

Registered: 2019-03-21

Posts: 33

Re: Issue with UHD Monitor

I still have not gotten this to work. What's more, the audio output jack on the monitor is not recognized at all anywhere. It's like this whole system cannot even see what kind of monitor I have or how it is connected. There isn't any option to anything but scale and use the default PC audio. Is there some limitation with DisplayPort connections or something, or does it just not like my monitor?

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 4,501

Website

Re: Issue with UHD Monitor

Did you check the /var/log/Xorg.0.log ? You can attach it here to analyze.

bin

Member

From: U.K.

Registered: 2016-01-28

Posts: 1,333

Re: Issue with UHD Monitor

You mention DisplayPort - it may be worth running this in Konsole to see if it makes a difference.

xrandr --output DisplayPort-0 --mode 1920x1080 --rate 60

It will also help to know more about your hardware - so please could you paste the output of

inxi -F

Adam33

Member

Registered: 2019-03-21

Posts: 33

Re: Issue with UHD Monitor

I have attached the log file.

The output of the first command line for xrandr is the same as trying to do anything with xrandr or the display settings. Additionally, it can't find anything called DisplayPort.
xrandr: Failed to get size of gamma for output default
warning: output DisplayPort-0 not found; ignoring

The inxi command yields this:
System:
  Host: adam-pc Kernel: 4.19.0-6-amd64 x86_64 bits: 64
  Desktop: Trinity R14.0.6 Distro: Q4OS 3.10.3-n1
Machine:
  Type: Desktop Mobo: ASRock model: Z390 Taichi serial: <root required>
  UEFI [Legacy]: American Megatrends v: P4.30 date: 11/26/2019
CPU:
  Topology: 6-Core model: Intel Core i5-9600K bits: 64 type: MCP
  L2 cache: 9216 KiB
  Speed: 800 MHz min/max: 800/4600 MHz Core speeds (MHz): 1: 800 2: 800
  3: 800 4: 800 5: 800 6: 800
Graphics:
  Device-1: Intel driver: N/A
  Display: x11 server: X.Org 1.20.4 driver: vesa unloaded: fbdev,modesetting
  resolution: 3840x2160~N/A
  OpenGL: renderer: llvmpipe (LLVM 7.0 256 bits) v: 3.3 Mesa 18.3.6
Audio:
  Device-1: Intel Cannon Lake PCH cAVS driver: snd_hda_intel
  Sound Server: ALSA v: k4.19.0-6-amd64
Network:
  Device-1: Intel Ethernet I219-V driver: e1000e
  IF: eno1 state: up speed: 1000 Mbps duplex: full mac: 70:85:c2:cc:57:b5
  Device-2: Intel Dual Band Wireless-AC 3168NGW [Stone Peak] driver: iwlwifi
  IF: wlp3s0 state: down mac: d4:3b:04:a2:06:9d
  Device-3: Intel I211 Gigabit Network driver: igb
  IF: enp4s0 state: down mac: 70:85:c2:cc:57:b7
Drives:
  Local Storage: total: 465.76 GiB used: 10.67 GiB (2.3%)
  ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 970 EVO Plus 500GB
  size: 465.76 GiB
Partition:
  ID-1: / size: 440.84 GiB used: 10.67 GiB (2.4%) fs: ext4
  dev: /dev/nvme0n1p1
  ID-2: swap-1 size: 16.87 GiB used: 0 KiB (0.0%) fs: swap
  dev: /dev/nvme0n1p2
Sensors:
  System Temperatures: cpu: 42.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Info:
  Processes: 177 Uptime: 22m Memory: 15.34 GiB used: 1.64 GiB (10.7%)
  Shell: bash inxi: 3.0.32

Thanks!

---

Attachments:
Xorg.0.log, Size: 67.52 KiB, Downloads: 527

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 4,501

Website

Re: Issue with UHD Monitor

Have you Intel graphics driver installed ?
$ sudo apt install xserver-xorg-video-intel

Dai_trying

Member

From: UK

Registered: 2015-12-14

Posts: 2,993

Re: Issue with UHD Monitor

That CPU was only launched Q4 of 2018 and so might not be compatible with the current kernel, you could try upgrading to the kernel available in debian-backports (5.04) (as well as graphics firmware) which might give you better results.

Adam33

Member

Registered: 2019-03-21

Posts: 33

Re: Issue with UHD Monitor

It looks like it is installed:
xserver-xorg-video-intel is already the newest version (2:2.99.917+git20180925-2).

It is a new CPU. Being somewhat new to Linux though, I once ruined a whole install trying to upgrade Linux kernel versions on a completely different distribution and an older computer and processor.

I did try again nonetheless, and as before, the display failed to even start. Kernel upgrades seem to kill the display entirely in my experience, so there must be something more to it in order to get more than a command prompt at startup.

Fortunately, I was able to Google my way to figure out how to remove the newly installed kernel via command line (which was available).

Apparently though something is off with the display settings. That "gamma" error message seemed strange.

Last edited by Adam33 (2020-01-25 07:24)

Dai_trying

Member

From: UK

Registered: 2015-12-14

Posts: 2,993

Re: Issue with UHD Monitor

That CPU was only launched Q4 of 2018 and so might not be compatible with the current kernel, you could try upgrading to the kernel available in debian-backports (5.04) (as well as graphics firmware) which might give you better results.

Adam33

Member

Registered: 2019-03-21

Posts: 33

Re: Issue with UHD Monitor

I seem to have overlooked that. I didn't seem to see any additional firmware available for install, but I could force an upgrade on the versions that were installed.

I did the firmware upgrades along with the kernel upgrade, and I got the same results. No display.

Last edited by Adam33 (2020-01-25 09:25)

Dai_trying

Member

From: UK

Registered: 2015-12-14

Posts: 2,993

Re: Issue with UHD Monitor

I recently upgraded my Ryzen box to use the 5.4 kernel and had to install firmware-misc-non-free and firmware-linux-non-free and I think firmware-linux as they all had firmwares relating to my system, I would check the installed packages and see if any firmware packages are already installed and then use the newer ones from backports (where available).

dpkg --get-selections | grep firmware

This will tell you which firmwares you have currently installed, although not all of them will be in use, and not all of them have been backported, but it will give you a starting point and I think the three I installed were all I needed.

Adam33

Member

Registered: 2019-03-21

Posts: 33

Re: Issue with UHD Monitor

Yes, I edited my last post. I missed that option at first. However, that upgrade failed to resolve the issue. It still failed.

Dai_trying

Member

From: UK

Registered: 2015-12-14

Posts: 2,993

Re: Issue with UHD Monitor

Ok, it was worth a try.