Comment 1 for bug 1084505

This is the error I get when using the uBLAS backend instead of PETSc:

ERROR: test_linear_operator (__main__.TestLinearOperator)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "LinearOperator.py", line 76, in test_linear_operator
    solve(A, x, b, "gmres", "none")
  File "/home/buildbot/fenicsbbot/trunk/dolfin-full/lib/python2.7/site-packages/dolfin/fem/solving.py", line 278, in solve
    return cpp.la_solve(*args)
  File "/home/buildbot/fenicsbbot/trunk/dolfin-full/lib/python2.7/site-packages/dolfin/cpp/la.py", line 4195, in la_solve
    return _la.la_solve(*args)
RuntimeError:

*** -------------------------------------------------------------------------
*** DOLFIN encountered an error. If you are not able to resolve this issue
*** using the information listed below, you can ask for help at
***
*** https://answers.launchpad.net/dolfin
***
*** Remember to include the error message listed below and, if possible,
*** include a *minimal* running example to reproduce the error.
***
*** -------------------------------------------------------------------------
*** Error: Unable to solve linear system using uBLAS Krylov solver.
*** Reason: Solution failed to converge.
*** Where: This error was encountered inside uBLASKrylovSolver.h.
*** Process: 0