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Re: SDDM and Save dialogues slow

Hi there,

Am Dienstag, 28. Mai 2019, 11:28:47 CEST schrieb Andreas v. Heydwolff:
> Hello,
> I'm on Stretch with backports and a regular Stretch KDE installation on
> a ThinkPad X1 Yoga (Skylake CPU and graphics, self compiled  latest
> kernel 4.14, now .122; a stock kernel 4.9 or 4.19 doesn't help).
> Since some update a few weeks ago resume does wake up the screensaver
> and mouse pointer, but the login box appears only after *half a minute*
> or more whereas previously it was there immediately. This somewhat
> defeats the purpose of Sleep and Resume. The battery no longer gets
> detected, and powerdevil freezes and/or shows no options for closing the
> lid.
> [...]

A few weeks before, I've upgraded several machines from Debian/Stretch (Kernel
4.9) to Debian/Buster (4.19, newer KDE/SDDM).

I'm also seeing the seemingly endless lag between (apparent) Resume at which
SDDM shows its wallpaper graphics and the moment when the password prompt
finally shows (sometimes it would not take input, disappear, then even later
re-appear and finally taking input).

I'm seeing this on exactly one of my machines, which is a sturdy old netbook
with a dualcore N450 Atom chip and Intel integrated graphics.

I'm *not* seeing this on Intel Core Duo, i-5, i-7 and Xeon machines. The password
prompt shows as quickly as it used to under Debian/Stretch.

Once I'm logged in, the oldish Atom is as quick as can be expected, but it
certainly *is* somewhat slower than under Stretch. That might indeed be
due to some processor bug mitigations.

However, it seems to me that the enormous lag at the SDDM login prompt
might have a cause which is not directly (or not entirely) due to Intel
microcode updates and Kernel mitigations.

Just 2 cent,



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