One black screen after unlock (multi screen setup)

[simonmint]

I have a multi-screen setup with two monitors. When I lock the machine and unlock it, it happens that only on one of the two screens the windows become visible again. On the other screen, I can only see the cursor, but the remainder of the screen is black.
Locking the screen again and unlocking it does not help.
Changing the positions of the screen in the display settings resolves it.
However, this is only possible when the "main" monitor with access to the settings is properly unlocked.
It is the one that stays dark, not the chance of doing things.

I also face the issues described here https://github.com/linuxmint/cinnamon-s ... issues/424 occasionally.
Where the unlock screen is not showing, and I put in my password blind.
I am not sure if they are linked.

[SMG]

I have a multi-screen setup with two monitors. When I lock the machine and unlock it, it happens that only on one of the two screens the windows become visible again. On the other screen, I can only see the cursor, but the remainder of the screen is black.

Please open the System Reports app and click the System Information tab on the left. Your computer's information should come up in the right pane. Then click the Copy button in the lower right and paste the results into a reply window here so we can see how Linux Mint views your hardware.

I also face the issues described here https://github.com/linuxmint/cinnamon-s ... issues/424 occasionally.
Where the unlock screen is not showing, and I put in my password blind.
I am not sure if they are linked.

I think they may be two different issues. Are the monitor numbers showing up correctly in the Display app?

[simonmint]

Sure, here is the paste of the system information.

Code: Select all

System:
  Kernel: 5.15.0-92-generic x86_64 bits: 64 compiler: gcc v: 11.4.0 Desktop: MATE 1.26.0
    info: mate-panel wm: marco 1.26.0 vt: 7 dm: LightDM 1.30.0 Distro: Linux Mint 21.2 Victoria
    base: Ubuntu 22.04 jammy
Machine:
  Type: Desktop System: Dell product: OptiPlex 5000 v: N/A serial: <superuser required> Chassis:
    type: 3 serial: <superuser required>
  Mobo: Dell model: 05WXFV v: A02 serial: <superuser required> UEFI: Dell v: 1.11.0
    date: 03/08/2023
CPU:
  Info: 6-core model: 12th Gen Intel Core i5-12500 bits: 64 type: MT MCP smt: enabled
    arch: Alder Lake rev: 5 cache: L1: 480 KiB L2: 7.5 MiB L3: 18 MiB
  Speed (MHz): avg: 2841 high: 4100 min/max: 800/4600 cores: 1: 940 2: 1018 3: 2710 4: 3188
    5: 4100 6: 4100 7: 2382 8: 3537 9: 3906 10: 3293 11: 2013 12: 2914 bogomips: 71884
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: Intel vendor: Dell driver: i915 v: kernel ports: active: DP-2,DP-3
    empty: DP-1, DP-4, HDMI-A-1, HDMI-A-2, HDMI-A-3, HDMI-A-4 bus-ID: 0000:00:02.0
    chip-ID: 8086:4690 class-ID: 0300
  Device-2: Logitech HD Webcam C615 type: USB driver: snd-usb-audio,uvcvideo bus-ID: 1-13.3:6
    chip-ID: 046d:082c class-ID: 0e02 serial: <filter>
  Display: x11 server: X.Org v: 1.21.1.4 compositor: marco v: 1.26.0 driver: X:
    loaded: modesetting unloaded: fbdev,vesa gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3840x1080 s-dpi: 96 s-size: 1016x286mm (40.0x11.3") s-diag: 1055mm (41.6")
  Monitor-1: DP-2 pos: right model: Philips PHL 241B8Q serial: <filter> res: 1920x1080 hz: 60
    dpi: 93 size: 527x296mm (20.7x11.7") diag: 604mm (23.8") modes: max: 1920x1080 min: 720x400
  Monitor-2: DP-3 pos: primary,left model: Philips PHL 241B8Q serial: <filter> res: 1920x1080
    hz: 60 dpi: 93 size: 527x296mm (20.7x11.7") diag: 604mm (23.8") modes: max: 1920x1080
    min: 720x400
  OpenGL: renderer: Mesa Intel UHD Graphics 770 (ADL-S GT1) v: 4.6 Mesa 23.0.4-0ubuntu1~22.04.1
    direct render: Yes
Audio:
  Device-1: Intel vendor: Dell driver: snd_hda_intel v: kernel bus-ID: 0000:00:1f.3
    chip-ID: 8086:7ad0 class-ID: 0403
  Device-2: Logitech HD Webcam C615 type: USB driver: snd-usb-audio,uvcvideo bus-ID: 1-13.3:6
    chip-ID: 046d:082c class-ID: 0e02 serial: <filter>
  Sound Server-1: ALSA v: k5.15.0-92-generic running: yes
  Sound Server-2: PulseAudio v: 15.99.1 running: yes
  Sound Server-3: PipeWire v: 0.3.48 running: yes
Network:
  Device-1: Intel Ethernet I219-LM vendor: Dell driver: e1000e v: kernel port: N/A
    bus-ID: 0000:00:1f.6 chip-ID: 8086:1a1c class-ID: 0200
  IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: <filter>
RAID:
  Hardware-1: Intel Volume Management Device NVMe RAID Controller driver: vmd v: 0.6 port: N/A
    bus-ID: 0000:00:0e.0 chip-ID: 8086:467f rev: class-ID: 0104
Drives:
  Local Storage: total: 2.29 TiB used: 102.37 GiB (4.4%)
  ID-1: /dev/nvme0n1 vendor: SK Hynix model: PC801 NVMe 512GB size: 476.94 GiB speed: 63.2 Gb/s
    lanes: 4 type: SSD serial: <filter> rev: 51003141 temp: 31.9 C scheme: GPT
  ID-2: /dev/sda vendor: Seagate model: ST2000DM008-2UB102 size: 1.82 TiB speed: 6.0 Gb/s
    type: HDD rpm: 7200 serial: <filter> rev: 1001
Partition:
  ID-1: / size: 467.89 GiB used: 102.37 GiB (21.9%) fs: ext4 dev: /dev/nvme0n1p2
  ID-2: /boot/efi size: 511 MiB used: 6.1 MiB (1.2%) fs: vfat dev: /dev/nvme0n1p1
Swap:
  ID-1: swap-1 type: file size: 2 GiB used: 0 KiB (0.0%) priority: -2 file: /swapfile
USB:
  Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 16 rev: 2.0 speed: 480 Mb/s
    chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 1-10:2 info: Cherry GmbH MX-Board 3.0 Keyboard type: Keyboard,HID
    driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 1.5 Mb/s power: 100mA
    chip-ID: 046a:010d class-ID: 0300
  Hub-2: 1-13:3 info: Genesys Logic Hub ports: 4 rev: 2.1 speed: 480 Mb/s power: 100mA
    chip-ID: 05e3:0610 class-ID: 0900
  Device-1: 1-13.2:11 info: Sunplus Innovation Optical Mouse type: Mouse
    driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 1.5 Mb/s power: 98mA chip-ID: 1bcf:0005
    class-ID: 0301
  Device-2: 1-13.3:6 info: Logitech HD Webcam C615 type: Audio,Video
    driver: snd-usb-audio,uvcvideo interfaces: 4 rev: 2.0 speed: 480 Mb/s power: 500mA
    chip-ID: 046d:082c class-ID: 0e02 serial: <filter>
  Hub-3: 1-13.4:7 info: Genesys Logic Hub ports: 4 rev: 2.1 speed: 480 Mb/s power: 100mA
    chip-ID: 05e3:0610 class-ID: 0900
  Hub-4: 2-0:1 info: Super-speed hub ports: 10 rev: 3.1 speed: 20 Gb/s chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-5: 2-5:2 info: Genesys Logic USB3.1 Hub ports: 4 rev: 3.1 speed: 5 Gb/s chip-ID: 05e3:0620
    class-ID: 0900
  Hub-6: 2-5.4:3 info: Genesys Logic USB3.1 Hub ports: 4 rev: 3.2 speed: 5 Gb/s
    chip-ID: 05e3:0626 class-ID: 0900
Sensors:
  System Temperatures: cpu: 32.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Repos:
  Packages: 2601 apt: 2589 flatpak: 12
  No active apt repos in: /etc/apt/sources.list
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
    1: deb http: //packages.linuxmint.com victoria main upstream import backport
    2: deb http: //archive.ubuntu.com/ubuntu jammy main restricted universe multiverse
    3: deb http: //archive.ubuntu.com/ubuntu jammy-updates main restricted universe multiverse
    4: deb http: //archive.ubuntu.com/ubuntu jammy-backports main restricted universe multiverse
    5: deb http: //security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
  Active apt repos in: /etc/apt/sources.list.d/skype-stable.list
    1: deb [arch=amd64] https: //repo.skype.com/deb stable main
  Active apt repos in: /etc/apt/sources.list.d/vscode.list
    1: deb [arch=amd64,arm64,armhf] http: //packages.microsoft.com/repos/code stable main
Info:
  Processes: 426 Uptime: 3d 7h 23m wakeups: 1 Memory: 31.04 GiB used: 12.66 GiB (40.8%)
  Init: systemd v: 249 runlevel: 5 Compilers: gcc: 11.4.0 alt: 11/12
  Client: Unknown python3.10 client inxi: 3.3.13

Yes, most likely, these are two issues. My thinking was that they might be related. Thus, I mentioned I also experience the missing unlock screen occasionally.
For the display numbering showing in the Display settings app.
I don't see anything odd. The numbering in the location preview matches the shown in the corners of the monitors.
The numbering starts from 2 (DP2 and DP3) which is slightly odd as I only have two physical display port sockets. Not sure if this is to be expected.

[SMG]

I also face the issues described here https://github.com/linuxmint/cinnamon-s ... issues/424 occasionally.
Where the unlock screen is not showing, and I put in my password blind.

That issue is with the Cinnamon screensaver. One does not usually have the Cinnamon screensaver running when they are using MATE like you are. The Cinnamon screensaver is for use with the Cinnamon desktop.

For the display numbering showing in the Display settings app.
I don't see anything odd. The numbering in the location preview matches the shown in the corners of the monitors.

You posted in the Desktop:Cinnamon forum, but you are not running Cinnamon. The problem with the screen numbering only applies to those using Cinnamon 6.0.

I will move your topic to the Desktop:MATE forum.

With a 12th-gen Intel CPU, I recommend you upgrade to the 6.5 kernel available in Update Manager. That will provide a newer graphics driver and maybe that will help.

Instructions for upgrading to the 6.5 kernel:

• Open Update Manager.
• Select View > Linux Kernels and click Continue.
• Make sure 6.5 is selected on the left panel and then click the top-most option on the right panel. An "Install" button will appear.
• Install the kernel and then reboot for it to become active.