First off, I’m fairly new to Linux, so please bear with me if I’m missing obvious stuff.
Ever since applying the system updates after the KDE Linux 2026-09-11 02:54 one, my boot time jumped from about ~30 seconds to ~90s. On top of that, anything widget-based (start menu, notifications, volume control) now causes serious lag when open.
I ran systemd-analyze plot on both a “good” boot (KDE Linux 2026-09-11 02:54, the last normal one) and a “bad” boot (KDE Linux 2026-09-16 02:54).
Yes. Booting into the older image (2026-09-11 02:54), I recover the faster startup time. Booting into any of the images after this one results in the long boot times.
I haven’t seen this on my KDE Linux system - the latest image (2026-09-16 12:22) has pretty much the same boot time as earlier ones.
But of course there are a lot of things that could differ between yours and mine.
From your output, it doesn’t seem to be one single thing causing the slowness.
Early in the boot, device initialisation is much slower. I notice that includes dev-tpm0.device, and TPM is known to sometimes be a cause of boot slowness.
But then that’s not the only thing, because a bunch of services later on are much slower on the bad boot than the good boot. A few examples:
I can’t see an obvious change that would cause all of these.
One more thing to check. Is the kernel version 7.2.4-arch1-2 both on the good and the bad boots? (I think this hasn’t changed over the last few days, but good to confirm.)
I also have a Lenovo, and the issue is more complex than just a slower boot sequence. It is clearly related to KDE Plasma, specifically the update to 6.7.5 from 6.7.4, where I didn’t encounter such problems, and I suspect it has something to do with the AMD Ryzen graphics. I run CachyOS on my laptop, with KDE, obviously, and I have the latest Beta of Fedora installed on another partition. Surprise—this Beta had 6.7.4 and worked perfectly, but after updating to 6.7.5, it showed the exact same issues as CachyOS. There are also other graphics-related side effects, for instance, a significant delay when changing the screen brightness.
This sounds like a different problem, which you could open a different topic for.
KDE Linux uses the 6.8 dev version of KDE Plasma, so the changes that OP found between KDE Linux 2026-09-11 and 2026-09-16 are not the same as the changes between 6.7.4 and 6.7.5.
I might have posted in the wrong topic—sorry about that. In the meantime, a new batch of updates has arrived, mostly firmware, including for the AMD GPU, and the issue has been resolved on CachyOS; everything is back to normal. I’m waiting for the fix to reach Fedora as well, since updates tend to arrive there a bit later.
Oh, interesting. Then it might not be Plasma related, and could actually be (even so slightly) relevant in that case. Maybe in the end it’s really something happening with the kernel.
There have definitely been AMD GPU-related issues in recent kernels and firmware, but I’d be surprised if those are causing the impacts OP sees here (like the slow discovery of disks, and NetworkManager being slow to start up).
Indeed. I suspect the cause is mostly outside Plasma - certainly the slow device startup seems to happen before anything Plasma-related could take effect.
