The screen rotation also stopped working after
the firmware upgrade. I also fixed it by removing the built in Weather widget.
However, I had to do a "wipe cache partition" afterwards; just removing the
widget alone (and rebooting) didn't get the job done.
How to wipe the cache partition of an S5
Turn off the device.
Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
When the Android System Recovery screen appears, release the Volume Up and Home keys.
Press the Volume Down key to highlight ‘wipe cache partition.’
Press the Power key to select.
When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
Press the Power key to restart the device.