Laptop turns back on whenever the display sleeps, sometimes exposing contents under the lockscreen

[NuclearManx]

Hi there,

I have recently got a new monitor (Dell AW3423DW), and it works like a dream on my main PC with Linux Mint. The monitor is the only display device that my PC has.

However, my laptop is a different story. I have the screensaver to start after 1 minute (locking the screen) and power management to turn the display off after 5 minutes. This worked OK on my old monitor via HDMI, but not the new Dell. What happens is that when this kicks in and the display turns off, after about 20 seconds or so it turns back on! And after another 5 minutes the cycle continues.

On top of this, there is a flaw whereby the contents of my actual screen is shown (e.g., my emails if I left that open) because the lock screen seems to bug and only take up the top left of the monitor, exposing the contents of the laptop monitor and most if the main monitor.

As a temporary measure, I have turned off auto input switch and eco mode on the monitor and that has resolved the issue. However, I would really like to be able to fix the issue from the OS side. Please let me know if you have any suggestions.

I am using 64-bit Linux Mint,
Cinnamon,
No output errors, just the above described behaviour.

inxi -Fxxxrz:

Code: Select all

System:
  Kernel: 5.15.0-53-generic x86_64 bits: 64 compiler: gcc v: 11.2.0
    Desktop: Cinnamon 5.4.12 tk: GTK 3.24.33 wm: Mutter dm: LightDM 1.30.0
    Distro: Linux Mint 21 Vanessa base: Ubuntu 22.04 jammy
Machine:
  Type: Laptop System: Dell product: Latitude 9420 v: N/A
    serial: <superuser required> Chassis: type: 10 serial: <superuser required>
  Mobo: Dell model: 08XKF8 v: A01 serial: <superuser required> UEFI: Dell
    v: 1.14.0 date: 08/08/2022
Battery:
  ID-1: BAT0 charge: 54.3 Wh (93.6%) condition: 58.0/59.1 Wh (98.1%)
    volts: 13.1 min: 11.6 model: BYD DELL VTH8516 type: Li-poly
    serial: <filter> status: Charging
  Device-1: hidpp_battery_0 model: Logitech Wireless Keyboard
    serial: <filter> charge: 55% (should be ignored) rechargeable: yes
    status: Discharging
  Device-2: hidpp_battery_1 model: Logitech Wireless Mouse MX Master 3
    serial: <filter> charge: 100% (should be ignored) rechargeable: yes
    status: Discharging
CPU:
  Info: quad core model: 11th Gen Intel Core i7-1185G7 bits: 64 type: MT MCP
    smt: enabled arch: Tiger Lake rev: 1 cache: L1: 320 KiB L2: 5 MiB
    L3: 12 MiB
  Speed (MHz): avg: 960 high: 1065 min/max: 400/4800 cores: 1: 973 2: 945
    3: 989 4: 958 5: 890 6: 1065 7: 924 8: 936 bogomips: 47923
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: Intel TigerLake-LP GT2 [Iris Xe Graphics] vendor: Dell
    driver: i915 v: kernel ports: active: HDMI-A-1,eDP-1
    empty: DP-1, DP-2, DP-3, DP-4, HDMI-A-2, HDMI-A-3, HDMI-A-4, HDMI-A-5
    bus-ID: 0000:00:02.0 chip-ID: 8086:9a49 class-ID: 0300
  Device-2: Logitech Webcam C270 type: USB driver: snd-usb-audio,uvcvideo
    bus-ID: 3-8:5 chip-ID: 046d:0825 class-ID: 0102
  Display: x11 server: X.Org v: 1.21.1.3 driver: X: loaded: modesetting
    unloaded: fbdev,vesa gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3440x2640 s-dpi: 96 s-size: 910x699mm (35.8x27.5")
    s-diag: 1147mm (45.2")
  Monitor-1: HDMI-1 mapped: HDMI-A-1 pos: primary,top-left
    model: Dell AW3423DW serial: <filter> res: 3440x1440 dpi: 108
    size: 809x354mm (31.9x13.9") diag: 883mm (34.8") modes: max: 3440x1440
    min: 640x480
  Monitor-2: eDP-1 pos: bottom-r model: AU Optronics res: 1920x1200 hz: 60
    dpi: 162 size: 301x188mm (11.9x7.4") diag: 355mm (14") modes: 1920x1200
  OpenGL: renderer: Mesa Intel Xe Graphics (TGL GT2) v: 4.6 Mesa 22.0.5
    direct render: Yes
Audio:
  Device-1: Intel vendor: Dell driver: intel-ipu6 bus-ID: 0000:00:05.0
    chip-ID: 8086:9a19 class-ID: 0480
  Device-2: Intel Tiger Lake-LP Smart Sound Audio vendor: Dell
    driver: sof-audio-pci-intel-tgl bus-ID: 0000:00:1f.3 chip-ID: 8086:a0c8
    class-ID: 0401
  Device-3: Logitech Webcam C270 type: USB driver: snd-usb-audio,uvcvideo
    bus-ID: 3-8:5 chip-ID: 046d:0825 class-ID: 0102
  Sound Server-1: ALSA v: k5.15.0-53-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 Wi-Fi 6 AX210/AX211/AX411 160MHz driver: iwlwifi v: kernel
    bus-ID: 0000:a3:00.0 chip-ID: 8086:2725 class-ID: 0280
  IF: wlp163s0 state: up mac: <filter>
  IF-ID-1: ppp0 state: unknown speed: N/A duplex: N/A mac: N/A
Bluetooth:
  Device-1: Intel AX210 Bluetooth type: USB driver: btusb v: 0.8
    bus-ID: 3-10:6 chip-ID: 8087:0032 class-ID: e001
  Report: hciconfig ID: hci0 rfk-id: 0 state: up address: <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: 8086:9a0b rev:
    class-ID: 0104
Drives:
  Local Storage: total: 476.94 GiB used: 62.77 GiB (13.2%)
  ID-1: /dev/nvme0n1 vendor: SK Hynix model: BC711 NVMe 512GB
    size: 476.94 GiB speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 41002131 temp: 24.9 C scheme: GPT
Partition:
  ID-1: / size: 273.65 GiB used: 31.35 GiB (11.5%) fs: ext4
    dev: /dev/nvme0n1p5
  ID-2: /boot/efi size: 495 MiB used: 67.1 MiB (13.6%) fs: vfat
    dev: /dev/nvme0n1p1
Swap:
  ID-1: swap-1 type: file size: 2 GiB used: 0 KiB (0.0%) priority: -2
    file: /swapfile
Sensors:
  System Temperatures: cpu: 30.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Repos:
  Packages: 2332 apt: 2326 flatpak: 6
  No active apt repos in: /etc/apt/sources.list
  Active apt repos in: /etc/apt/sources.list.d/deadsnakes-ppa-jammy.list
    1: deb http://ppa.launchpad.net/deadsnakes/ppa/ubuntu jammy main
  Active apt repos in: /etc/apt/sources.list.d/oem-solutions-group-intel-ipu6-jammy.list
    1: deb http://ppa.launchpad.net/oem-solutions-group/intel-ipu6/ubuntu jammy main
  Active apt repos in: /etc/apt/sources.list.d/oem-somerville-tentacool-meta.list
    1: deb http://dell.archive.canonical.com/ jammy somerville
    2: deb http://dell.archive.canonical.com/ jammy somerville-tentacool
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
    1: deb https://mirror.cov.ukservers.com/linuxmint vanessa 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/teams.list
    1: deb [arch=amd64] https://packages.microsoft.com/repos/ms-teams 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: 314 Uptime: 27m wakeups: 20 Memory: 31.07 GiB
  used: 4.54 GiB (14.6%) Init: systemd v: 249 runlevel: 5 Compilers:
  gcc: 11.3.0 alt: 11 Shell: Bash v: 5.1.16 running-in: gnome-terminal
  inxi: 3.3.13

[SMG]

However, my laptop is a different story. I have the screensaver to start after 1 minute (locking the screen) and power management to turn the display off after 5 minutes. This worked OK on my old monitor via HDMI, but not the new Dell. What happens is that when this kicks in and the display turns off, after about 20 seconds or so it turns back on! And after another 5 minutes the cycle continues.

Welcome to the forum, NuclearManx.

I have moved your topic from Hardware Support to Desktop: Cinnamon because what you have described sounds like issues which have already been raised in that forum.

On top of this, there is a flaw whereby the contents of my actual screen is shown (e.g., my emails if I left that open) because the lock screen seems to bug and only take up the top left of the monitor, exposing the contents of the laptop monitor and most if the main monitor.

Your description sounds like this issue Lock screen security issue (imo)5 which is a known bug.

As a temporary measure, I have turned off auto input switch and eco mode on the monitor and that has resolved the issue. However, I would really like to be able to fix the issue from the OS side.

Were you using the same operating system version with the old monitor (where this worked) as compared to the new monitor (where it does not work)? Or were you using an LM20 version when using the old monitor?

According to Dell Latitude 9420 System BIOS, version 1.15.0 has a fix related to external monitors, "- Fixed the issue where the external monitor does not work when the system resumes from shutdown or hibernate mode."
Machine:
Type: Laptop System: Dell product: Latitude 9420 v: N/A
serial: <superuser required> Chassis: type: 10 serial: <superuser required>
Mobo: Dell model: 08XKF8 v: A01 serial: <superuser required> UEFI: Dell
v: 1.14.0 date: 08/08/2022

Maybe the updated BIOS/UEFI will help with the issue with the new monitor.

There are also two OEM kernels available, 5.17-oem and 6.0-oem, we could try if the BIOS update does not help.

[NuclearManx]

Thank you for your reply!

I was using the same OS with the old monitor where this worked. This is a fairly new laptop so it has only ever had LM21 installed.

Thanks for pointing out that BIOS update. I have just updated that but unfortunately that does not seem to have resolved the problem.

What do the OEM kernels do? And how would you recommend I go about trying them?

[SMG]

I was using the same OS with the old monitor where this worked. This is a fairly new laptop so it has only ever had LM21 installed.

So both cases were using this newer laptop. Originally you had the older monitor, but now you have a newer monitor.

Many newer monitors have "energy-saving" features which can sometimes cause differences in how they react when compared to older monitors.

What do the OEM kernels do? And how would you recommend I go about trying them?

OEM Kernels have a slightly difference design, but they are still maintained my Canonical. Right now, they are the only newer-than-5.15 kernels options available within the Linux Mint ecosystem.

The OEM kernels are available in Synaptic Package Manager, but you can also install them from the command line. It is possible the newer kernels will have updated graphics drivers for your computer so they may impact this situation.

You can install the latest 5.17-oem kernel with sudo apt-get install linux-oem-22.04 and reboot.

You can install the latest 6.0-oem kernel with sudo apt-get install linux-oem-22.04b and reboot.

If neither work, you can remove them using Update Manager as long as you are not booted into the kernel you are removing. Linux Mint automatically boots into the highest number installed kernel.

If these do not work, we may have to use xrandr commands to turn off the monitor. Some others have had to do that although there is not yet a common theme among those who seem to run into this type of issue.

[NuclearManx]

Thanks for the suggestions and information.

The laptop today seems to be sleeping the screen correctly with no further action taken. I am not sure why. Hopefully this solution lasts long-term, but if not I will try the kernels!