Please ignore this question. dsolve does hang, but I had typo in the timelimit command itself when I wrote the test. Fixing this, now it timesout OK.
Maybe someone can look why dsolve hangs on this ode. But since timelimit does work, there is a workaround.
I was checking Maple's dsolve on this textbook problem
The book gives the answer in the back as
When using Maple's dsolve, I found it hangs. The stange thing, is that adding timelimit() also hangs. I can understand dsolve() hanging sometimes. But what I do not understand is why with timelimit it also hangs?
I've waited 20 minutes and then gave up. As you see, the timelimit is 20 seconds. May be if I wait 2 hrs or 20 hrs or 20 days, it will finally timeout. I do not know but can't wait that long.
Do others see same problem on this ode? Does it hang for you? How about on the mac or Linux?
During this time, I see mserver.exe running at very high CPU. I restarted Maple few times, but this did not help.
Maple 2021.2 on windows 10. May be one day Maplesoft will fix timelimit so it works as expected.