After some experimenting and google'ing, I think I figured out, what the
reason for this issue is:
kwin of Plasma 5 seems to require the "SSE2" CPU extension, which my
Athlon XP 3000+ CPU does not have (it just has MMX, 3DNow! and SSE).
See also here:
** Also affects: kubuntu-meta (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1614308
Title:
kwin crashes when booting from Kubuntu 16.04 32bit
1st thought was, that this might be related to the nVidea GFX Card.
But replacing it by a Radeon HD 3450 did not help.
kwin crashes in the exactly same way as with the nVidea card.
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next trial was booting from Kubuntu 14.04.5 LTS Live DVD.
And that indeed works nicely on the mentioned hardware.
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https://bugs.launchpad.net/bugs/1614308
Title:
kwin crashes when
** Also affects: iso (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: iso (Ubuntu)
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https://bugs.launchpad.net/bugs/1614308
Title:
kwin crashes when booting
