Linux console remains blank after HDMI cable unplugged and replugged in

updat · 06-02-2023, 09:45 AM

Here's the scenario:

1. I boot up my computer which has kernel 5.15, while connected to HDMI, to the Linux virtual console (not X). All the text appears normal.
2. I unplug the HDMI because I need to use the monitor for something else, then I plug it back in.
3. I observe that the Linux console is blank/black and no amount of typing changes that. I also try changing virtual consoles (ctrl-alt-Fn) and this does not fix the issue.

Is this a known issue? Is there a fix for it?
Thanks.

yancek · 06-03-2023, 05:57 AM

Which Linux are you using and how old is your hardware and what hardware do you have? I have no problem doing what you tried with Slackware 15 and Ubuntu 20.04.

kingbeowulf · 06-04-2023, 04:02 PM

yes, which GPU model? I have a similar issue (Slackware64 15) and a Radeon RX 6650 XT with amdgpu F/OSS driver when hotplugging DP and HDMI - or just monitor power cycle. A RX590 and RX 5700 XT work fine, as do any of the Nvidia GPUs (proprietary binary blob).

There are some reports of hotplug / GPU DPM power management for the NAVI2 and newer GPUs.

mrmazda · 06-04-2023, 10:44 PM

Which distro and WM or DE are in use? inxi -Faz input/output pasted here using code tags would answer these and previous questions.

updat · 06-05-2023, 12:23 AM

Quote:

Originally Posted by yancek

Which Linux are you using and how old is your hardware and what hardware do you have? I have no problem doing what you tried with Slackware 15 and Ubuntu 20.04.

I'm using a RISC-V board. It happens with two distros -- Armbian and another unnamed distro that is maybe based on Ubuntu. The GPU isn't supported yet, so there is no GPU driver. This is a framebuffer device problem as far as I can tell.

updat · 06-05-2023, 09:25 AM

Quote:

Originally Posted by mrmazda

Which distro and WM or DE are in use? inxi -Faz input/output pasted here using code tags would answer these and previous questions.

I wasn't aware of inxi, that's good to know about.

Code:

System:
  Kernel: 5.15.107-15659-g7943fd6427b0-dirty arch: riscv64 bits: 64 compiler: N/A
    parameters: root=UUID=2c4dfb94-467f-4e57-b303-1ef00950faaa console=ttyS0,115200n8 console=tty0
    earlycon=sbi rootflags=data=writeback stmmaceth=chain_mode:1 rw rw no_console_suspend
    consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0 splash
    plymouth.ignore-serial-consoles
  Console: tty 1 Distro: Ubuntu 23.04 (Lunar Lobster)
Machine:
  Type: RISCV System: Pine64 Star64 details: N/A serial: <filter>
CPU:
  Info: model: N/A variant: u74-mc bits: 64 type: MCP arch: riscv64 family: N/A model-id: N/A
  Topology: cpus: 1x cores: 4 smt: <unsupported> cache: L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB
    L2: 2 MiB desc: 1x2 MiB
  Speed (MHz): avg: 375 min/max: 375/1500 scaling: driver: cpufreq-dt governor: ondemand cores:
    1: 375 2: 375 3: 375 4: 375 bogomips: N/A
  Features: N/A
  Vulnerabilities: No CPU vulnerability/bugs data available.
Graphics:
  Device-1: img-gpu driver: N/A bus-ID: N/A chip-ID: img-gpu:18000000 class-ID: gpu
  Device-2: jh7110-hdmi driver: innohdmi_starfive v: N/A bus-ID: N/A chip-ID: starfive:29590000
    class-ID: hdmi
  Device-3: jh7110-display driver: starfive v: N/A bus-ID: N/A chip-ID: starfive:soc
    class-ID: display-subsystem
  Display: server: X.org v: 1.21.1.7 with: Xwayland v: 22.1.8 driver: X: loaded: modesetting
    unloaded: fbdev dri: kms_swrast gpu: innohdmi_starfive,starfive tty: 240x67
  Monitor-1: HDMI-A-1 model: ASUS VA24E serial: <filter> built: 2020 res: 1920x1080 dpi: 93
    gamma: 1.2 size: 527x296mm (20.75x11.65") diag: 604mm (23.8") ratio: 16:9 modes: max: 1920x1080
    min: 640x480
  API: OpenGL Message: GL data unavailable in console and glxinfo missing.
Audio:
  Device-1: jh7110-pwmdac driver: starfive_pwmdac bus-ID: N/A chip-ID: starfive:100b0000
    class-ID: pwmdac
  Device-2: jh7110-hdmi driver: innohdmi_starfive bus-ID: N/A chip-ID: starfive:29590000
    class-ID: hdmi
  Device-3: simple-audio-card driver: N/A bus-ID: N/A chip-ID: simple-audio-card:soc
    class-ID: snd-card0
  Device-4: simple-audio-card driver: asoc_simple_card bus-ID: N/A
    chip-ID: simple-audio-card:soc class-ID: snd-card1
  Device-5: simple-audio-card driver: N/A bus-ID: N/A chip-ID: simple-audio-card:soc
    class-ID: snd-card2
  Device-6: simple-audio-card driver: asoc_simple_card bus-ID: N/A
    chip-ID: simple-audio-card:soc class-ID: snd-card3
  Device-7: simple-audio-card driver: N/A bus-ID: N/A chip-ID: simple-audio-card:soc
    class-ID: snd-card4
  Device-8: simple-audio-card driver: N/A bus-ID: N/A chip-ID: simple-audio-card:soc
    class-ID: snd-card5
  Device-9: simple-audio-card driver: N/A bus-ID: N/A chip-ID: simple-audio-card:soc
    class-ID: snd-card6
  Sound API: ALSA v: k5.15.107-15659-g7943fd6427b0-dirty running: yes
Network:
  Device-1: dwmac driver: starfive_eth_plat v: N/A port: N/A bus-ID: N/A
    chip-ID: starfive:16030000 class-ID: ethernet
  IF: eth0 state: down mac: <filter>
  Device-2: dwmac driver: starfive_eth_plat v: N/A port: N/A bus-ID: N/A
    chip-ID: starfive:16040000 class-ID: ethernet
  IF: eth1 state: up speed: 100 Mbps duplex: full mac: <filter>
  Device-3: rfkill-gpio driver: N/A port: N/A bus-ID: N/A chip-ID: rfkill-gpio:rfkill_wifi
    class-ID: rfkill_wifi
  IF-ID-1: wlan0 state: down mac: <filter>
Bluetooth:
  Device-1: Realtek 802.11ax WLAN Adapter type: USB driver: rtl8852bu bus-ID: 1-1.2:4
    chip-ID: 0bda:b852 class-ID: e001
  Report: This feature requires one of these tools: hciconfig/bt-adapter
Drives:
  Local Storage: total: 119.25 GiB used: 9.72 GiB (8.1%)
  ID-1: /dev/mmcblk1 maj-min: 179:0 vendor: Samsung model: BD4QT size: 119.25 GiB block-size:
    physical: 512 B logical: 512 B type: SSD serial: <filter> scheme: GPT
  SMART Message: Unknown smartctl error. Unable to generate data.
Partition:
  ID-1: / raw-size: 118.04 GiB size: 116.25 GiB (98.48%) used: 9.72 GiB (8.4%) fs: ext4
    block-size: 4096 B dev: /dev/mmcblk1p1 maj-min: 179:1
Swap:
  Alert: No swap data was found.
Sensors:
  Src: /sys System Temperatures: cpu: 49.5 C mobo: N/A
  Fan Speeds (RPM): N/A
Info:
  Processes: 124 Uptime: 2m Memory: 7.54 GiB used: 248.6 MiB (3.2%) Init: systemd v: 252
  target: graphical (5) default: graphical tool: systemctl Compilers: gcc: 12.2.0 alt: 12
  clang: 15.0.7 Packages: pm: dpkg pkgs: 1303 libs: 814 tools: apt,apt-get,aptitude
  Shell: Bash (login) v: 5.2.15 running-in: tty 1 inxi: 3.3.25