Arch Linux

orbit1849

Member

Registered: 2022-10-13

Posts: 13

Slow performance after a system update

The performance went from good to so slow that I can see the window borders being drawn and shifted around when I use various function keys to move windows (i3).

I'm inclined to suspect this is an xorg issue, as there's no performance drop when running a CPU intensive application. However, I also don't have a problem playing back video or running a basic OpenGL application like glxgears.

I/O might be a problem, but while certain simple programs, like vim, take several seconds to start, firefox starts quite fast, like before. This is just very weird and confusing.

I don't have anything suspicious in dmesg.

I had before the update: 5.19.7.arch1-1, after the update: 5.19.13-arch1-1

I don't even know where to start debugging this.

orbit1849

Member

Registered: 2022-10-13

Posts: 13

Re: Slow performance after a system update

I fixed this by downgrading my kernel and headers. For anyone else with the same problem:

pacman -U linux-5.19.7.arch1-1-x86_64.pkg.tar.zst linux-headers-5.19.7.arch1-1-x86_64.pkg.tar.zst

Now if someone could share why this broke after this upgrade, that would be great.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,206

Re: Slow performance after a system update

There are some reports that this broke when using xorg's modesetting DDX instead of device specifics like xf86-video-amdgpu.

Since this is technically an userspace regression it would be fruitful if someone affected could actually bisect the kernel to find the offending commit.