Setting f200_laser_power on started device results in hang

[tasptz]

When I try to set f200_laser_power it sometimes causes my program to hang, as it does not return from the set_option call. Is this a bug or is it not intended/allowed to set this option on a started device?

Required Info
Camera Model	SR300
Firmware Version	3.17.0.0
Operating System & Version	Windows 8.1 64 bit
Build System	VS2015

[dorodnic]

Hi tasptz,
It sounds very much like a known bug on Windows 8.1. You can verify by repeating your tests on Windows 10. Alternatively, check the call-stack of the thread stuck on set_option - on Windows 8.1 calls to IKsControl::KsProperty would sometimes dead-lock inside the driver.
You can try installing KB3075872 and KB2919355, designed specifically to solve this problem.
The only potential software work-around we came up with is calling IKsControl::KsProperty on a separate thread and then killing it if it is taking too long. It is complicated and we run the risk of leaking resources, so we decided not to implement this in librealsense.

[tasptz]

Hi dorodnic,
I had the second update already installed - so the first one seems to have solved the problem. Thanks.