1920 x 1200 Monitor Now Displays only 1600 x 1200

[shneor]

This change occurred ofter I installed all the updates last Wednesday June 29 2022. Previously, I had no problems for years through many versions of Linux Mint. I'm running Mint 20.3 Mate. It's running on a Lenovo Thinkcentre 630e with Intel UHD graphics 620. The distorted screen is difficult for me. System Reports shows no problems. I have tested the monitor (a DEll Ultrasharp 22") and it's fine. I would appreciate any help. The only alternative I can think of is to use an earlier kernel version. I hope someone might have a suggestion. Thanks in advance.

[SMG]

This change occurred ofter I installed all the updates last Wednesday June 29 2022. Previously, I had no problems for years through many versions of Linux Mint. I'm running Mint 20.3 Mate. It's running on a Lenovo Thinkcentre 630e with Intel UHD graphics 620.

Please give us information about your install by entering this command in a terminal:

Code: Select all

inxi -Fxxxrz

Click </> from the mini toolbar above the textbox where you type your reply and then place your cursor between the code tags and paste the results of the command between the code tags [code]Results[/code]. This will let us know how Mint sees your hardware.

Please also let us know what "all the updates last Wednesday June 29 2022" might mean. (Not everyone updates their computers at the same time.) You can find what updates you made in Update Manager in View > History of Updates.

[motoryzen]

Adding SMG's comment, if you'll hit that spacebar a couple of times after clicking on the </> button..it will make it easier to aim that pasting of that terminal command's results into it

[antikythera]

There's actually an even easier way of sharing the same system information. Open System Reports, click on System Information followed by Copy. Then paste it already formatted for the forum in the necessary code tags from there. Alternatively use the Upload button and post the link instead.

I'm getting a Dell P2421 shortly so will keep an eye on this thread since it has the same 16:10 resolution.

[shneor]

Code: Select all

shneor@Enif:~$ inxi -Fxxxrz
System:
  Kernel: 5.4.0-121-generic x86_64 bits: 64 compiler: gcc v: 9.4.0 
  Desktop: MATE 1.26.0 info: mate-panel wm: marco 1.26.0 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.3 Una base: Ubuntu 20.04 focal 
Machine:
  Type: Mini-pc System: LENOVO product: 10YM0093US v: ThinkCentre M630e 
  serial: <filter> Chassis: type: 35 serial: <filter> 
  Mobo: LENOVO model: 3144 v: SDK0J40697 WIN 3305305802127 serial: <filter> 
  UEFI: LENOVO v: M28KT27A date: 05/26/2019 
CPU:
  Topology: Quad Core model: Intel Core i5-8265U bits: 64 type: MT MCP 
  arch: Kaby Lake rev: C L2 cache: 6144 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 28800 
  Speed: 900 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 900 2: 900 
  3: 900 4: 900 5: 900 6: 900 7: 900 8: 900 
Graphics:
  Device-1: Intel UHD Graphics 620 vendor: Lenovo driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:3ea0 
  Display: x11 server: X.Org 1.20.13 driver: modesetting 
  unloaded: fbdev,vesa compositor: marco v: 1.26.0 
  resolution: 1920x1200~60Hz 
  OpenGL: renderer: Mesa Intel UHD Graphics 620 (WHL GT2) v: 4.6 Mesa 21.2.6 
  direct render: Yes 
Audio:
  Device-1: Intel Cannon Point-LP High Definition Audio vendor: Lenovo 
  driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:9dc8 
  Device-2: Asahi Kasei Microsystems AK5370 I/F A/D Converter type: USB 
  driver: snd-usb-audio bus ID: 1-3.3:5 chip ID: 0556:0001 
  Device-3: Microdia type: USB driver: snd-usb-audio,uvcvideo 
  bus ID: 1-7.1:6 chip ID: 0c45:6366 serial: <filter> 
  Sound Server: ALSA v: k5.4.0-121-generic 
Network:
  Device-1: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: efa0 
  bus ID: 01:00.0 chip ID: 8086:24fd 
  IF: wlp1s0 state: down mac: <filter> 
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: Lenovo driver: r8169 v: kernel port: 3000 bus ID: 02:00.0 
  chip ID: 10ec:8168 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A 
Drives:
  Local Storage: total: 238.47 GiB used: 53.93 GiB (22.6%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB256HBHQ-000L7 
  size: 238.47 GiB speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: 4M2QEXH7 
  scheme: GPT 
Partition:
  ID-1: / size: 233.24 GiB used: 53.92 GiB (23.1%) fs: ext4 
  dev: /dev/nvme0n1p2 
Sensors:
  System Temperatures: cpu: 34.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/eosrei-fonts-focal.list 
  1: deb http://ppa.launchpad.net/eosrei/fonts/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
  1: deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
  Active apt repos in: /etc/apt/sources.list.d/google-earth-pro.list 
  1: deb [arch=amd64] http://dl.google.com/linux/earth/deb/ stable main
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com una main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  Active apt repos in: /etc/apt/sources.list.d/rvm-smplayer-focal.list 
  1: deb http://ppa.launchpad.net/rvm/smplayer/ubuntu focal main
Info:
  Processes: 247 Uptime: 5m Memory: 15.51 GiB used: 1.04 GiB (6.7%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.4.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: mate-terminal inxi: 3.0.38 
shneor@Enif:~$

[shneor]

[SMG]

The inxi output is showing a resolution of 1920x1200.

Graphics:
Device-1: Intel UHD Graphics 620 vendor: Lenovo driver: i915 v: kernel
bus ID: 00:02.0 chip ID: 8086:3ea0
Display: x11 server: X.Org 1.20.13 driver: modesetting
unloaded: fbdev,vesa compositor: marco v: 1.26.0
resolution: 1920x1200~60Hz
OpenGL: renderer: Mesa Intel UHD Graphics 620 (WHL GT2) v: 4.6 Mesa 21.2.6
direct render: Yes

Where are you seeing 1600 x 1200?

What is the output of xrandr?

With an 8th-gen Intel CPU, you might want to switch to using a newer kernel such as 5.13 or 5.15. Both are available in Update Manager.

[shneor]

xrandr
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 256mm x 192mm
1920x1200 59.95*
1920x1080 60.00
1680x1050 59.88
1280x1024 60.02
1280x720 60.00 59.94
1024x768 60.00
800x600 60.32
640x480 60.00 59.94

My monitor only displays 1600 x 1200. That is the problem. Of course it has always been set at 1920 x 1200! But the actual display is only 1600 x 1200. Also, the login screen is something like 640 x 320, not like it used to be.

[shneor]

Also, according to Update Manager, I am currently on kernel 5.4.0-121-generic, seems to be later than 5.15*

[SMG]

The xrandr output shows *= current resolution and += preferred resolution. There is no preferred resolution showing, but the system is picking up that the current resolution 1920 x 1200 and the overall screen for X Server is 1920 x 1200.

Code: Select all

Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384
HDMI-2 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 256mm x 192mm
   1920x1200     59.95* 

My monitor only displays 1600 x 1200. That is the problem. Of course it has always been set at 1920 x 1200! But the actual display is only 1600 x 1200.

What measurement criteria are you using to say the display is only 1600 x 1200? Is there a specific program that is telling you that? The data you have posted so far does not indicate that so it is difficult for us to know what you are experiencing to know what the issue might be.

Also, according to Update Manager, I am currently on kernel 5.4.0-121-generic, seems to be later than 5.15*

These are kernel designations. You could think of them as model numbers. They are not decimal math. You currently have a kernel from the 5.4 series. A newer kernel series will have a higher number to the right of the decimal point. Thus the 5.15 kernel series is newer than than 5.4 kernel series because 15 is a larger number than 4.

[shneor]

First, I can easily see the difference on my screen. Second, when I press the monitor menu, it tells me that the resolution is 1600 x 1200. Again, I have used this monitor and Linux Mint for many years, and this is the first time the resolution is screwed up.

[shneor]

Also, 5.15 is supported until February 2023 while 5.4 is supported until 2025. 5.8 is supported to "end of life" though I'm not sure what that means.

[shneor]

Also the Display app misidentifies my monitor. It's a Dell Ultrasharp 22", but Display thinks it is an integrated Tech Express 27". Maybe that's the key. But the entire screen is displayed on the monitor, just at a weird resolution.

[SMG]

First, I can easily see the difference on my screen. Second, when I press the monitor menu, it tells me that the resolution is 1600 x 1200. Again, I have used this monitor and Linux Mint for many years, and this is the first time the resolution is screwed up.

You are describing an extremely unusual situation where the monitor is not displaying correctly, but the resolution the monitor is sending to the computer about the display is correct. Usually, if the computer sees the wrong resolution it is because the wrong information has been sent to the computer through the cable and we have ways to address that. You have a different situation.

Also the Display app misidentifies my monitor. It's a Dell Ultrasharp 22", but Display thinks it is an integrated Tech Express 27". Maybe that's the key. But the entire screen is displayed on the monitor, just at a weird resolution.

That probably is the key. The monitor sends its identifying information through the cable to the computer. It sounds like the information being sent may have been altered as it passed from the monitor to the computer. Do you have another cable you can try? When cables go bad, they can often be good one day and faulty the next. It is possible a cable issue altered the data being sent to the computer which is causing the computer to think it has a different monitor connected than the one which is connected.

Also, 5.15 is supported until February 2023 while 5.4 is supported until 2025. 5.8 is supported to "end of life" though I'm not sure what that means.

End of life means it is dead. It has reached its end of life and it is no longer being supported.

I repeat 4 is a smaller number than 15 which means the 5.15 kernel is newer. Both kernels are now frozen and only receiving security and bug-fix updates so the fact one is supported until 2025 and the other until 2023 is not relevant to what drivers they include. When we reach February 2023 there will be options for you to continue to have a newer kernel which is also receiving support. You do not have to worry about that now.

[shneor]

I replaced the cables, and bought a new monitor. The new monitor so far displays 1920 x 1200 BUT Linux still identifies the monitor as an Integrated Express 27". The monitor is a Dell. Linux display originally identified the monitor I replaced correctly. This seems to be Linux problem, not anything else.

[SMG]

Linux still identifies the monitor as an Integrated Express 27". The monitor is a Dell. Linux display originally identified the monitor I replaced correctly. This seems to be Linux problem, not anything else

Linux does not make up the names. There is an international standards organization for identifying monitors. Linux-based distros use the database from that organization to determine what display names to show. If the information from the monitor (which is passed through the cable to the computer) is not correct, then there is no way for your operating system to know that. It can only display a name based on the information it gets.

(Just because Dell put their name on the monitor does not mean Dell made it.)

[antikythera]

I replaced the cables, and bought a new monitor. The new monitor so far displays 1920 x 1200 BUT Linux still identifies the monitor as an Integrated Express 27". The monitor is a Dell. Linux display originally identified the monitor I replaced correctly. This seems to be Linux problem, not anything else.

It's more likely an Intel driver snafu causing bad EDID recognition. I got my Dell P2421 and it worked out of the box with both my AMD and NVIDIA cards with Linux at native resolution 1920x1200. It's also given the right name of Dell Inc. and not Integrated Express.

I'm even using a cheap Amazon Basics HDMI cable from the AM1 system because it's long enough to reach. The NVIDIA is over DP.

[antikythera]

Another thread about specifically Intel GPU connected monitor resolution and EDID issues: viewtopic.php?f=59&t=377651

Seems to be a pattern emerging because I have seen 3 separate users post about this since updating their systems this week.

So yes, rolling back the updates may be prudent for now

[SMG]

Seems to be a pattern emerging because I have seen 3 separate users post about this since updating their systems this week.

So yes, rolling back the updates may be prudent for now

Rolling back what updates? The problem in this topic originated three weeks ago and the OP was using the 5.4 kernel at the time. Please explain this "pattern" you are seeing.

[antikythera]

rolling back 3 weeks isn't that difficult depending on their backup regime. the pattern is the increasing number of people with Intel 620/630 graphics posting about wrong monitor resolutions.