I'm experiencing an issue with HDMI on Ubuntu 24.04 LTS. My external monitor, which works perfectly fine on Windows and used to work on this same PC when Windows was the main OS, isn't being detected now that I'm running Ubuntu.
xrandr
Screen 0: minimum 16 x 16, current 1920 x 1080, maximum 32767 x 32767
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 340mm x 190mm
1920x1080 120.01*+
1440x1080 120.03
1400x1050 120.01
1280x1024 119.96
1280x960 119.89
1152x864 119.94
1024x768 120.02
800x600 119.85
640x480 119.52
320x240 119.73
1680x1050 119.99
1440x900 120.07
1280x800 120.01
1152x720 119.94
960x600 120.04
928x580 119.87
800x500 119.91
768x480 119.71
720x480 119.65
640x400 119.64
320x200 117.55
1600x900 120.07
1368x768 119.99
1280x720 119.86
1024x576 119.85
864x486 119.69
720x400 119.54
640x350 120.03
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04.1 LTS
Release: 24.04
Codename: noble
Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 14 [Radeon RX 5500/5500M / Pro 5500M] (rev c1)
The HDMI connection just doesn't seem to register at all. Has anyone else faced a similar problem or have any suggestions on how to fix this?
lspci | grep VGA
07:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Renoir [Radeon RX Vega 6 (Ryzen 4000/5000 Mobile Series)] (rev c7)
I've also edited grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.exp_hw_support=1"
No luck. I think this is not a hardware issue because before I had Windows as main OS and never had any issue.
What else I tried:
sudo ubuntu-drivers autoinstall
All the available drivers are already installed.
Not sure how to follow this Can't get internal and external monitor working simultaneously with 20.04 on laptop with AMD Ryzen 7 4800H and Nvidia RTX 2060 in my case with AMD GPU that I have.
lspci -nn | grep -E 'VGA|Display'
03:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 14 [Radeon RX 5500/5500M / Pro 5500M] [1002:7340] (rev c1)
07:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Renoir [Radeon Vega Series / Radeon Vega Mobile Series] [1002:1636] (rev c7)
ls /etc/modprobe.d/
alsa-base.conf blacklist-oss.conf
amd64-microcode-blacklist.conf blacklist-rare-network.conf
blacklist-ath_pci.conf dkms.conf
blacklist.conf intel-microcode-blacklist.conf
blacklist-firewire.conf iwlwifi.conf
blacklist-framebuffer.conf vmware-fuse.conf
blacklist-modem.conf
What else can I try?
