Rendering a video with KDEnlive 22.08.1 under Ubuntu 22.04 on the Acer Nitro5 with the hardware accelerated VAAPI Intel H264 profile aborts with this error: Driver does not support any RC mode compatible with selected options (supported modes: CQP). I'm not deep enough into the KDEnlive architecture to understand what I'm doing, my superficial understanding … Continue reading Driver does not support any RC mode compatible with selected options (supported modes: CQP)
Tag: Troubleshooting
Acer Nitro 5 power button broken in Ubuntu 20.04
Update 2023.03.17: a reader of this blog, W0CKY, came up with a much better solution: sudo setkeycodes 55 116 I packaged that into a script: #!/bin/bash if [[ $EUID -ne 0 ]]; then echo re-running as root exec sudo /bin/bash "$0" "$@" else echo rewriting key codes setkeycodes 55 116 fi ... configured sudoers to … Continue reading Acer Nitro 5 power button broken in Ubuntu 20.04
Slow rsync on ext4 filesystem
On a rather hefty rsync job between two local ext4 filesystems, writing on the target (a mechanical hard drive which should be able to sustain 100 mb/s) would fluctuate strongly (between 0 mb/s and 160 mb/s) and effectively slow down to a few mb/s on average after a few minutes. While I didn't find the … Continue reading Slow rsync on ext4 filesystem
Ubuntu 20.04 not resolving local network hostnames
An Ubuntu 20.04 laptop installation started not being able to resolve the names of hosts in the same local network. Although the host names were registered with the router, the laptop wouldn't be able to resolve those host names. Surprisingly, neither netbios resolution worked (although nbtscan would find those hosts). The solution is to bypass … Continue reading Ubuntu 20.04 not resolving local network hostnames
Samba anonymous shares
I'm currently writing up changes to the perfect, cheap NAS [1]. A major change is that I dropped support for user-level windows/samba shares and am using only a few public browsable shares. It turns out that Windows clients always ask the user for a password even though the samba share is anonymous. The reason seems … Continue reading Samba anonymous shares

