Lenovo Legion 5 Gen 6 AMD with nvidia backlight issue under Manjaro

The Legion 5 Gen 6 AMD Ryzen with NVIDIA graphics (15ACH6H, model 82JU00APUS) is what I have on my hand. The Linux system I use is Manjaro due to its simplicity. I’ve experienced a very common backlight issue, Fn key won’t adjust the backlight at all, it’s always on 100% brightness. I use discrete / …

Resolve virsh start a domain (VM) failed problem

After CVE-2019-11477 and a few other CVEs broke out, Linux kernel released 5.1.11 to address the vulnerabilities. My VM host machine is constantly running on the latest kernel (provided by ELRepo). When I reboot into the new kernel and want to start one of my KVM boxes, this error appears: Host CPU does not provide …