Linux

No audio through HDMI output on Fedora 36

Audio had been fine through HDMI output from graphics card (Radeon 6450). After a system update, it stopped working.

Settings / Sound / Output Devices only showed: 'HDMI / DisplayPort - Built-in audio', not the Radeon card.

On the internet I found a few people had this problem. It is to do with having alsa-lib version 1.2.7.
Following advice, I downgraded to version 1.2.6, by issuing sudo dnf downgrade alsa*, which took me back to version 1.2.7.

After rebooting I had the option under 'Settings / Sound / Output Devices' of 'HDMI / DisplayPort - caicos HDMI audio [Radeon ... etc.'

(14/06/2022)

Remote access to Linux desktop from Windows machine

On the Linux machine

I am not sure whether all of these steps are absolutely necessary, but I was following some instructions gleaned from the internet.

As superuser:

• edit smb-conf file to make the workgroup as specified on the Windows machine
• dnf install xrdp
• systemctl start xrdp
• systemctl enable xrdp

In case firewall gives problems:

• firewall-cmd --add-port = 3389/tcp --permanent
• firewall-cmd --reload

On Windows machine - Remote Desktop app

• enter IP address of Linux machine (I use fixed IP addresses)
• true colour 24-bit display (this seems to be important!)
• full screen (or whatever you want)

(14/06/2022)

Change default gateway for network

I use Fedora (32) and xfce on a computer. I also find it useful to have fixed IP addresses on computers, printers, etc. on the network. When you install Fedora, you can enter all the details about IP addresses, gateway, DNS servers, etc. I had to replace my modem/router the other day, which meant a change of gateway address from 198.162.1.254 to 198.162.1.1. I am sure that there used to be a GUI to do this (in xfce?) but I cannot now find it.

I discovered that the information is in the configuration file at /etc/sysconfig/network-scripts/ifcfg-enp1s8. but I could not edit it in a graphical text editor. Thinking about this again, I think now that, had I logged in as root, it would probably have worked. However, that did not occur at the time, so, with hardly any previous experience, I launched vi! That took me back 40 years and needed some Googling to get the basics. I only needed to change 254 to 1.

All I needed to know was that:

• There is a command mode and an input mode.
• In command mode, you type i to get into insert mode.
• Do the editing, using cursor keys, etc.
• ESC to return to command mode.
• Then :wq to write file and exit.

Phew! Now done. (06/06/2020)

I can now see that nano would have been a much less stressful text editor! (08/06/2020)

Updated 08/06/2020