External Monitors not showing up.

[cybershifter]

This may be a dock issue, or may be a display issue, not sure. Or a computer! It's all fair game at this point. So, here's the background. I have an HP Thunderbolt dock that I use to connect my Dell XPS 13 to my two HDMI screens. They are ASUS VC279's. The dock is an HP Thunderbolt Dock 120W G2. Here's the kicker, it worked before, and now suddenly it doesn't. I unhooked it to use the laptop elsewhere, plugged it back in, no dice. Here's the inxi:

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cyber@EVE-Reborn:~$ inxi -Fxxxrz
System:
  Kernel: 5.13.0-41-generic x86_64 bits: 64 compiler: N/A 
  Desktop: Cinnamon 5.2.7 wm: muffin 5.2.1 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.3 Una base: Ubuntu 20.04 focal 
Machine:
  Type: Convertible System: Dell product: XPS 13 7390 2-in-1 v: N/A 
  serial: <filter> Chassis: type: 31 serial: <filter> 
  Mobo: Dell model: 0VF9GF v: A02 serial: <filter> UEFI: Dell v: 1.7.1 
  date: 12/28/2020 
Battery:
  ID-1: BAT0 charge: 33.5 Wh condition: 47.5/50.0 Wh (95%) volts: 8.2/7.6 
  model: BYD DELL XX3T711 type: Li-poly serial: <filter> status: Charging 
CPU:
  Topology: Quad Core model: Intel Core i7-1065G7 bits: 64 type: MT MCP 
  arch: Ice Lake rev: 5 L2 cache: 8192 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 23961 
  Speed: 1111 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 989 2: 1142 
  3: 1101 4: 1101 5: 1101 6: 1099 7: 1002 8: 1101 
Graphics:
  Device-1: Intel Iris Plus Graphics G7 vendor: Dell driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:8a52 
  Display: x11 server: X.Org 1.20.13 driver: modesetting 
  unloaded: fbdev,vesa resolution: 3840x2400~60Hz 
  OpenGL: renderer: Mesa Intel Iris Plus Graphics (ICL GT2) 
  v: 4.6 Mesa 21.2.6 direct render: Yes 
Audio:
  Device-1: Intel vendor: Dell driver: N/A bus ID: 00:05.0 
  chip ID: 8086:8a19 
  Device-2: Intel Smart Sound Audio vendor: Dell driver: snd_hda_intel 
  v: kernel bus ID: 00:1f.3 chip ID: 8086:34c8 
  Device-3: HP type: USB driver: hid-generic,snd-usb-audio,usbhid 
  bus ID: 5-1.3.5:6 chip ID: 03f0:0269 serial: <filter> 
  Sound Server: ALSA v: k5.13.0-41-generic 
Network:
  Device-1: Intel Killer Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter 
  vendor: Bigfoot Networks driver: iwlwifi v: kernel port: 4000 
  bus ID: 00:14.3 chip ID: 8086:34f0 
  IF: wlp0s20f3 state: up mac: <filter> 
  Device-2: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152 
  bus ID: 6-1.3.3:4 chip ID: 0bda:8153 serial: <filter> 
  IF: enxec8eb5a98da0 state: down mac: <filter> 
Drives:
  Local Storage: total: 953.87 GiB used: 34.96 GiB (3.7%) 
  ID-1: /dev/nvme0n1 model: KBG40ZPZ1T02 NVMe KIOXIA 1024GB size: 953.87 GiB 
  speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: 10400106 scheme: GPT 
Partition:
  ID-1: / size: 143.18 GiB used: 24.83 GiB (17.3%) fs: ext4 
  dev: /dev/nvme0n1p5 
  ID-2: /home size: 580.55 GiB used: 5.05 GiB (0.9%) fs: ext4 
  dev: /dev/nvme0n1p6 
  ID-3: swap-1 size: 16.56 GiB used: 0 KiB (0.0%) fs: swap 
  dev: /dev/nvme0n1p7 
Sensors:
  System Temperatures: cpu: 41.0 C mobo: N/A 
  Fan Speeds (RPM): cpu: 4681 mobo: 5080 fan-2: 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
  1: deb [arch=amd64] https://dl.google.com/linux/chrome/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/slack.list 
  1: deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main
  Active apt repos in: /etc/apt/sources.list.d/teams.list 
  1: deb [arch=amd64] https://packages.microsoft.com/repos/ms-teams stable main
Info:
  Processes: 283 Uptime: 6m Memory: 15.40 GiB used: 1.78 GiB (11.6%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.4.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: gnome-terminal inxi: 3.0.38 

And just for S&G here's the boltctl:

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cyber@EVE-Reborn:~$ boltctl
 ○ HP Thunderbolt Dock G2
   ├─ type:          peripheral
   ├─ name:          Thunderbolt Dock G2
   ├─ vendor:        HP
   ├─ uuid:          001841cc-a569-f000-ffff-ffffffffffff
   ├─ generation:    Thunderbolt 3
   ├─ status:        disconnected
   ├─ authorized:    Thu 28 Apr 2022 06:42:54 PM UTC
   ├─ connected:     Thu 28 Apr 2022 06:42:54 PM UTC
   └─ stored:        Thu 28 Apr 2022 06:42:54 PM UTC
      ├─ policy:     iommu
      └─ key:        no

 ● HP Thunderbolt Dock G2 #2
   ├─ type:          peripheral
   ├─ name:          Thunderbolt Dock G2
   ├─ vendor:        HP
   ├─ uuid:          005949f9-b1d6-f000-ffff-ffffffffffff
   ├─ generation:    Thunderbolt 3
   ├─ status:        authorized
   │  ├─ domain:     015987f5-a1f2-8680-ffff-ffffffffffff
   │  ├─ rx speed:   40 Gb/s = 2 lanes * 20 Gb/s
   │  ├─ tx speed:   40 Gb/s = 2 lanes * 20 Gb/s
   │  └─ authflags:  none
   ├─ authorized:    Thu 19 May 2022 03:52:16 AM UTC
   ├─ connected:     Thu 19 May 2022 03:52:16 AM UTC
   └─ stored:        Fri 29 Apr 2022 12:23:17 AM UTC
      ├─ policy:     iommu
      └─ key:        no

A computer with a thunderbolt dock is new to me to begin with, and this computer is new to me. So I'm kind of at a loss.

[cybershifter]

I should also note, the computer sees the dock when I plug it in, at least as much as it needs to charge it.

[SMG]

I have an HP Thunderbolt dock that I use to connect my Dell XPS 13 to my two HDMI screens. They are ASUS VC279's. The dock is an HP Thunderbolt Dock 120W G2. Here's the kicker, it worked before, and now suddenly it doesn't. I unhooked it to use the laptop elsewhere, plugged it back in, no dice.

Have you tried restarting X Server (Ctl-Alt-Backspace) or rebooted since you plugged the dock back in?

The information from the last person with that dock whom I helped Data sheet for HP Thunderbolt Dock G2 with Audio Module indicates it does not have HDMI ports. I presume you are using DP-HDMI cables.

The latest Dell XPS 13 7390 System BIOS is version 1.14.1.

Machine:
Type: Convertible System: Dell product: XPS 13 7390 2-in-1 v: N/A
serial: <filter> Chassis: type: 31 serial: <filter>
Mobo: Dell model: 0VF9GF v: A02 serial: <filter> UEFI: Dell v: 1.7.1
date: 12/28/2020

I see in version 1.8.0 it mentions "- Fixed the issue where the system stops responding for a few seconds when a USB 3.1 hub or Type-C hub is connected." Maybe that somehow is a factor in this issue.

[cybershifter]

Sorry, I got sick AND started a new job this week. I tried rebooting, but I didn't try restarting X server. I can also try updating the BIOS. I probably need to do that anyway. I bought the laptop from Backmarket, it's a couple years old. So I'll give that a try too. Thanks! I'll report back what happens.