Laptop monitor not waking up after disconnecting external monitor while in sleep mode

Support
1

Hi all,

I normally work on my Thinkpad T460 with an external monitor attached to the mini-display port. However, if I close the lid (which makes the laptop go to sleep mode) and then unplug the mini-display port, the laptop screen doesn’t wake up when I open it up again. The only way to make it work again is to connect the mini-display port again, and press Ctrl-F7 to switch to ‘extend monitor’. It looks like when the laptop is in sleep mode, the external monitor mode is automatically set to ‘switch to external monitor’ (which I never choose), so when the laptop wakes up without the external monitor, it just keeps the screen off.
This is very annoying because if I’m outside, I ended either resetting the laptop, or opening a terminal (Ctrl+F1), logging in and resetting the UI (systemctl restart sddm), causing the lose of everything I was working on.

Any suggestion on how to address/prevent this issue?

Thanks!

Here are my system details:

System:
  Kernel: 5.15.16-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
    parameters: BOOT_IMAGE=/vmlinuz-5.15-x86_64
    root=UUID=96927b75-2787-47cf-a626-697ee8748302 rw quiet apparmor=1
    security=apparmor resume=UUID=f2b7b667-be29-436e-ad43-41d86178643c
    udev.log_priority=3
  Desktop: KDE Plasma 5.23.5 tk: Qt 5.15.2 wm: kwin_x11 vt: 1 dm: SDDM
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Laptop System: LENOVO product: 20FMS00101 v: ThinkPad T460
    serial: <superuser required> Chassis: type: 10 serial: <superuser required>
  Mobo: LENOVO model: 20FMS00101 v: SDK0J40697 WIN
    serial: <superuser required> UEFI-[Legacy]: LENOVO v: R06ET33W (1.07 )
    date: 01/05/2016
Battery:
  ID-1: BAT0 charge: 10.9 Wh (66.1%) condition: 16.5/23.2 Wh (71.0%)
    volts: 12.4 min: 11.1 model: SANYO 45N1773 type: Li-ion serial: <filter>
    status: Charging
  ID-2: BAT1 charge: 1.1 Wh (5.4%) condition: 20.4/23.5 Wh (86.8%)
    volts: 11.2 min: 11.4 model: LGC 45N1127 type: Li-ion serial: <filter>
    status: N/A
Memory:
  RAM: total: 15.06 GiB used: 3.01 GiB (20.0%)
  RAM Report:
    permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i5-6300U bits: 64 type: MT MCP arch: Skylake
    family: 6 model-id: 0x4E (78) stepping: 3 microcode: 0xEA
  Topology: cpus: 1x cores: 2 tpc: 2 threads: 4 smt: enabled cache:
    L1: 128 KiB desc: d-2x32 KiB; i-2x32 KiB L2: 512 KiB desc: 2x256 KiB
    L3: 3 MiB desc: 1x3 MiB
  Speed (MHz): avg: 2800 high: 2801 min/max: 400/3000 scaling:
    driver: intel_pstate governor: powersave cores: 1: 2801 2: 2800 3: 2800
    4: 2800 bogomips: 20004
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon
    art avx avx2 bmi1 bmi2 bts clflush clflushopt cmov constant_tsc cpuid
    cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est
    f16c flexpriority flush_l1d fma fpu fsgsbase fxsr ht hwp hwp_act_window
    hwp_epp hwp_notify ibpb ibrs ida intel_pt invpcid invpcid_single lahf_lm
    lm mca mce md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae
    pat pbe pcid pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pti
    pts rdrand rdseed rdtscp rep_good sdbg sep smap smep smx ss ssbd sse sse2
    sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust
    tsc_deadline_timer vme vmx vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt
    xsaves xtopology xtpr
  Vulnerabilities:
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf
    mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: spec_store_bypass
    mitigation: Speculative Store Bypass disabled via prctl and seccomp
  Type: spectre_v1
    mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional,
    IBRS_FW, STIBP: conditional, RSB filling
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort mitigation: TSX disabled
Graphics:
  Device-1: Intel Skylake GT2 [HD Graphics 520] vendor: Lenovo driver: i915
    v: kernel bus-ID: 00:02.0 chip-ID: 8086:1916 class-ID: 0300
  Device-2: Chicony Integrated Camera type: USB driver: uvcvideo
    bus-ID: 1-10:3 chip-ID: 04f2:b52c class-ID: 0e02 serial: <filter>
  Display: x11 server: X.org 1.21.1.3 compositor: kwin_x11 driver:
    loaded: modesetting alternate: fbdev,vesa resolution: <missing: xdpyinfo>
  Message: Unable to show advanced data. Required tool glxinfo missing.
Audio:
  Device-1: Intel Sunrise Point-LP HD Audio vendor: Lenovo
    driver: snd_hda_intel v: kernel alternate: snd_soc_skl bus-ID: 00:1f.3
    chip-ID: 8086:9d70 class-ID: 0403
  Sound Server-1: ALSA v: k5.15.16-1-MANJARO running: yes
  Sound Server-2: JACK v: 1.9.20 running: no
  Sound Server-3: PulseAudio v: 15.0 running: yes
  Sound Server-4: PipeWire v: 0.3.43 running: yes
Network:
  Device-1: Intel Ethernet I219-LM vendor: Lenovo driver: e1000e v: kernel
    port: N/A bus-ID: 00:1f.6 chip-ID: 8086:156f class-ID: 0200
  IF: enp0s31f6 state: down mac: <filter>
  Device-2: Intel Wireless 8260 driver: iwlwifi v: kernel bus-ID: 04:00.0
    chip-ID: 8086:24f3 class-ID: 0280
  IF: wlp4s0 state: up mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  WAN IP: <filter>
Bluetooth:
  Message: No bluetooth data found.
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 465.76 GiB used: 281.15 GiB (60.4%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/sda maj-min: 8:0 vendor: Samsung model: SSD 870 EVO 500GB
    size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
    type: SSD serial: <filter> rev: 1B6Q scheme: MBR
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 79.1 GiB size: 77.31 GiB (97.73%) used: 42.52 GiB (55.0%)
    fs: ext4 dev: /dev/sda3 maj-min: 8:3 label: N/A
    uuid: 96927b75-2787-47cf-a626-697ee8748302
  ID-2: /boot raw-size: 512 MiB size: 487.2 MiB (95.16%)
    used: 112.6 MiB (23.1%) fs: ext4 dev: /dev/sda1 maj-min: 8:1 label: N/A
    uuid: ddfb8dc4-5e68-4366-9ad6-dc6e0cf2ac06
  ID-3: /home raw-size: 365.65 GiB size: 358.84 GiB (98.14%)
    used: 238.53 GiB (66.5%) fs: ext4 dev: /dev/sda4 maj-min: 8:4 label: N/A
    uuid: 579cfd47-45cd-42d0-bf5c-d52775b7bbad
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 20.51 GiB used: 0 KiB (0.0%)
    priority: -2 dev: /dev/sda2 maj-min: 8:2 label: N/A
    uuid: f2b7b667-be29-436e-ad43-41d86178643c
Unmounted:
  Message: No unmounted partitions found.
USB:
  Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 12 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 1-10:3 info: Chicony Integrated Camera type: Video
    driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA
    chip-ID: 04f2:b52c class-ID: 0e02 serial: <filter>
  Hub-2: 2-0:1 info: Super-speed hub ports: 6 rev: 3.0 speed: 5 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
  System Temperatures: cpu: 47.0 C pch: 40.0 C mobo: N/A
  Fan Speeds (RPM): fan-1: 0
Info:
  Processes: 227 Uptime: 3m wakeups: 1 Init: systemd v: 250 tool: systemctl
  Compilers: gcc: 11.1.0 clang: 13.0.0 Packages: 1478 pacman: 1448 lib: 367
  flatpak: 8 snap: 22 Shell: Zsh v: 5.8 default: Bash v: 5.1.16
  running-in: konsole inxi: 3.3.12
2

Hello please give us mor informations please

:+1: Welcome to Manjaro! :+1:

  1. Please read this:
    [HowTo] Provide System Information
    and press the three dots … below your post and press the :pencil2: to give us more information so we can see what’s really going on.
    Now we know the symptom of the disease, but we need some more probing to know where the origin lies… :grin:
  2. An inxi --admin --verbosity=7 --filter --no-host --width would be the minimum required information for us to be able to help you. (Personally Identifiable Information like serial numbers and MAC addresses will be filtered out by the above command)
    Also, please copy-paste that output in-between 3 backticks ``` at the beginning and end of the code/text.

:+1:

P.S. If you want to notify me that you did provide this information, please :heart: this message and I’ll come back and have another look.
P.P.S. If you enter a bit more details in your profile, we can also see which Desktop Environment you’re using, which exact CPU/GPU or Kernel, … you have without typing it every time

1 Like
3

Hi!

First try to change to a TTY if that happens (CTRL+ALT+F2). If you can change, login and fix the issue with xrandr. In this case you can assign the xrandr command to a shortcut and press it everytime you need it. Otherwise, if you can’t change TTY, you’ll have to look at the logs with journalctl after bringing the monitor back to see what’s happening. Probably, the disconnection isn’t logged because the computer is at sleep, and then it isn’t checked upon resumed. If this is the case, you can also fix it with a systemd service where you call the xrandr command.