Comment # 1 on bug 1172555 from Michel Normand

Created attachment 838526 [details]
python_controls_twppc64le2_passed_build.log

If I do a local osc build in a ppc64le guest, then no failure is reported as
per attached python_controls_twppc64le2_passed_build.log
related testSiso last almost 1000s  but all osc build completed with no hang.

=== extract python_controls_twppc64le2_passed_build.log
[ 1256s] testHinfsyn (control.tests.robust_array_test.TestHinf)
[ 1262s] Test hinfsyn ... ok
[ 1262s] testSiso (control.tests.robust_array_test.TestMixsyn)
[ 2153s] mixsyn with SISO system ... ok
===

I do not know how to investigate such failure.