[Bug 97890] Kerbal Space Program freezes randomly when DRI3 is enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97890

--- Comment #1 from Eero Tamminen <eero.t.tamminen at intel.com> ---
I tried KSP v1.1.3.1289 that Steam currently provides, on SKL GT2 with Ubuntu
16.04 (i.e. v4.4 kernel with i915 backport for v4.6) configured for DRI3.

I got freeze at KSP startup when using Ubuntu 16.04 Mesa 11.2.  It was early in
the loading phase.  There were 35(!) threads in total, most waiting in futexes
& mutexes, but some were still active.  Game just didn't progress forward.

Using Git version of Mesa the game worked without freezes many times, until one
time it again froze.

When it starts OK, there are some rendering issues.  E.g. when selecting
settings, none of the setting tabs has any visible content.  In the game
itself:
- "Choose flag" and Runway dialogs contents are also empty
- Lines shown on hangar floor are flickering and their texture is garbage

The game log file:
~/.config/unity3d/Squad/Kerbal\ Space\ Program/Player.log

Doesn't show any warnings from Mesa.  So yes, KSP 1.1 doesn't seem to work very
well.


As to your KSP 1.2-pre version...

Do the KSP settings tabs look OK for you?

When the game freezes, if you do "strace -f -p PID" (e.g. as root through SSH
console), is the game still active?

If you attach to it with Gdb, where it's stuck:
$ gdb /proc/$(pidof KSP.x86)/exe $(pidof KSP.x86)
(gdb) info threads
(gdb) bt
?

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