[Openmcl-devel] MAc wont sleep while running CCL

David Hodge david at hodge.net.nz
Sat Jan 14 19:07:15 PST 2017

Hi there,

Just started using CCL and its a been a nice experience so far.

I have one question. CCL apparently prevents the Mac from sleeping.

The culprit appears to be something called SDL_DisablescreenSaver

Any ideas why this is happening would be appreciated.

Clozure Common Lisp Version 1.11-r16635, Mac OS Sierra


[5501]> pmset -g assertions
2017-01-15 15:45:45 +1300
Assertion status system-wide:
    BackgroundTask                 0
    ApplePushServiceTask           0
    UserIsActive                   1
    PreventUserIdleDisplaySleep    1
    PreventSystemSleep             0
    ExternalMedia                  0
    PreventUserIdleSystemSleep     0
    NetworkClientActive            0
Listed by owning process:
    pid 81433(dx86cl64): [0x0000e51e00059f3e] 123:13:00 
PreventUserIdleDisplaySleep named: "dx86cl64 using SDL_DisableScreenSaver"
    pid 128(hidd): [0x0002722f000990a2] 00:00:43 UserIsActive named: 
     Timeout will fire in 360 secs Action=TimeoutActionRelease
Kernel Assertions: 0x100=MAGICWAKE
    id=504  level=255 0x100=MAGICWAKE mod=15/01/17, 2:31 PM 
description=en1 owner=en1
Idle sleep preventers: IODisplayWrangler

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