does sympy dsolve implement series solution for regular point for first order ode (Frobenius series) ?

I searched and see no other hints I could use for first order. Here is one example of many
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from sympy import *
x = symbols("x")
y = Function("y")
ode = Eq(x*Derivative(y(x), x) + y(x),0)
ics = {}
dsolve(ode,func=y(x),ics=ics,hint="1st_power_series",x0=0,n=6)
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It gives 

 ValueError : ODE x*Derivative(y(x), x) + y(x) does not match hint 1st_power_series

I am using 1.13.3 on Linux.

This page has table of many more such examples with links to all the code used. It shows sympy failed to solved all these problems.

Thanks,
--Nasser