MP 1,1-5,1 Mac Pro refuses to sleep

[eicca]

This is new behavior as of this past week. I send the Sleep command, either from the menu bar or CMD+ALT+Eject, and the screen goes black, and then comes right back on two seconds later.

Reboot didn't help.

In Activity Monitor, no process is shown as "preventing sleep" except HIDD which is normal.

running "pmset -g assertions" in Terminal reveals nothing.

Like, seriously, WTF?

 

[Fastsavage]

Any new USB devices plugged in or software updates recently?

 

[eicca]

Any new USB devices plugged in or software updates recently?

Nope, been the exact same setup for months.

 

[Fastsavage]

How about SMC and NVRAM reset - just in case.....

 

[tsialex]

When you have problems with sleep, the fist thing to check is the BR2032 RTC battery voltage. The moment the battery can't power the RTC circuit with the correct voltage anymore your Mac Pro becomes crazy.

Also, if change the RTC battery from BR2032 to a CR2032, you will have to replace it frequently.

 

[eicca]

SMC and PRAM reset didn’t help. It was behaving as if there was an input signal of some kind happening constantly. Pondering on @Fastsavage ’s response I remembered that my flight sim controller was usually plugged into the front of my USB hub, but I moved it to the rear about a week ago. Unplugged the flight stick and now the computer seems to be behaving properly.

The hub itself must be wonky. It’s just a cheap Amazon hub.

 

[Fastsavage]

Excellent pleased you sorted it

 

[eicca]

Hopefully it stays sorted or I may end up buying an M1 machine ?

 

[MacNB2]

When you have problems with sleep, the fist thing to check is the BR2032 RTC battery voltage. The moment the battery can't power the RTC circuit with the correct voltage anymore your Mac Pro becomes crazy.

Also, if change the RTC battery from BR2032 to a CR2032, you will have to replace it frequently.

?
Good comparison and some reason why one should use a BR2032 on a Mac:

DL2032 vs CR2032 vs BR2032: Which 2032 battery should you use? - Battery Globe

A look at the kinds of batteries you can use in devices such as car key fobs, or digital kitchen scales. Should you use a DL2032, CR2032, or BR2032 in such devices?

batteryglobe.com