Is there a modified Alt + Sysrq + R + E + I + S + U + B which only shuts down the computer (without rebooting)?
There are days when the system is frozen and I'm too tired to debug the problem and might make it even worse if I tried to fix it in my drowsy state...
I tried Alt + Sysrq + R + E + I + S + O, but there is no effect after typing the sequence slowly (I repeated the sequence after a few seconds to confirm I did not mis-type).
After trying the above combination, I used the regular Alt + Sysrq + R + E + I + S + U + B which did work (rebooted).
I'm currently using force shutdown (ie. press and hold power button)