M2 Mac mini: DCP dies on waking from s2idle

[chadmed]

asahi-diagnose-20241010-192429.txt

FAR 40, standard M2 mini connected to an AOC 1440p144 monitor. Tested with SFW 13.x and 15.x

Steps to reproduce:

1. Boot into FAR 40
2. Put machine into s2idle
3. Attempt to wake machine from s2idle

Expected behaviour: machine wakes up and monitor turns back on

Observed behaviour: machine wakes up, but DCP dies. Rest of machine remains responsive, but monitor never comes back on even when re-plugged.

[chadmed]

Monitor's EDID

[chadmed]

Seemingly relevant kernel log after waking from s2idle

Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: DP2HDMI HPD irq, connected:1
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: resume: HPD connected:1
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: dcp_dptx_connect(port=0)
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: AppleDCPDPTX.cpp:355: [AFK]powering nub 0x871140
Oct 10 18:58:37 REDACTED kernel: usb 3-1: reset full-speed USB device number 2 using xhci-hcd
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: DP2HDMI HPD irq, 500ms debounce: connected:1
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: dcp_dptx_connect(port=0)
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: dcp_poweron: DP2HDMI HPD connected:1
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: dcp_dptx_connect(port=0)
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: dcp_poweron() starting
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: FramebufferDCP.cpp:5931: IOMFBParameter_adaptive_sync Req minRR = 0x0, mediaTargetRate = 0x0, Fractional Rate = 0
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: set_digital_out_mode(color:87 timing:83) "2560x1440": 144 592000 2560 2568 2600 2666 1440 1465 1473 1543 0x40 0x0
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: set_digital_out_mode() color mode depth:8 format:0 colorimetry:10 eotf:0 range:0
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: nifiedPipeline.cpp:7462: set_digital_out_mode: Modeset requested for colorID: 87, timingID: 83
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: PPipeDCP_H13P.cpp:18011: Dual pipe disabled offset 0
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: nifiedPipeline.cpp:7700: set_mode: timingID: 83 colorID: 87
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: oInterfaceIOAV.cpp:1211: auto VideoInterfaceIOAV::set_mode(uint32_t, uint32_t, uint32_t *, uint32_t *, IOAVArray *, IOAVArray *)::(anonymous class)::ope
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: nifiedPipeline.cpp:7739: setmode failed
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: nifiedPipeline.cpp:7758: ERROR: Modeset done, but pipe not enabled: fSoftPowerState=1, fDisplayPowerState=0, fHardPowerState=1
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: RTKit: syslog message: nifiedPipeline.cpp:7465: set_digital_out_mode returned 80000104
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: set_digital_out_mode finished:8299
Oct 10 18:58:37 REDACTED kernel: PM: resume devices took 1.727 seconds
Oct 10 18:58:37 REDACTED kernel: OOM killer enabled.
Oct 10 18:58:37 REDACTED kernel: Restarting tasks ... done.
Oct 10 18:58:37 REDACTED kernel: random: crng reseeded on system resumption
Oct 10 18:58:37 REDACTED kernel: PM: suspend exit
Oct 10 18:58:37 REDACTED kernel: apple-dcp 271c00000.dcp: crtc_atomic_check: disconnected but no modeset