Hello, USB devies was disconnect suddendly when its working sometimes.
I checked the kern.log, have some message as follow:
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.709283] PM: suspend entry 2021-10-23 06:13:00.009354016 UTC
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.709287] PM: Syncing filesystems … done.
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.753761] PM: Preparing system for sleep (mem)
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.767453] tegradc 15200000.nvdisplay: blank - powerdown
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.826235] extcon-disp-state external-connection:disp-state: cable 47 state 0
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.826239] Extcon AUX1(HDMI) disable
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.847302] tegra_nvdisp_handle_pd_disable: Powergated Head1 pd
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.847633] tegra_nvdisp_handle_pd_disable: Powergated Head0 pd
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.847768] tegradc 15210000.nvdisplay: blank - powerdown
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.853853] tegradc 15200000.nvdisplay: blank - powerdown
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.853874] tegradc 15200000.nvdisplay: unblank
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.854348] tegra_nvdisp_handle_pd_enable: Unpowergated Head0 pd
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.854415] tegra_nvdisp_handle_pd_enable: Unpowergated Head1 pd
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.855461] Parent Clock set for DC plld2
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.858811] tegradc 15200000.nvdisplay: hdmi: tmds rate:65000K prod-setting:prod_c_hdmi_54m_111m
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.859997] tegradc 15200000.nvdisplay: hdmi: get YCC quant from EDID.
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.896058] extcon-disp-state external-connection:disp-state: cable 47 state 1
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.896060] Extcon AUX1(HDMI) enable
Oct 23 14:13:00 kenexs-desktop kernel: [ 312.910118] tegradc 15200000.nvdisplay: sync windows ret = 247
Oct 23 14:13:01 kenexs-desktop kernel: [ 312.953591] Freezing user space processes … (elapsed 0.004 seconds) done.
Oct 23 14:13:01 kenexs-desktop kernel: [ 312.957797] Freezing remaining freezable tasks … (elapsed 0.001 seconds) done.
Oct 23 14:13:01 kenexs-desktop kernel: [ 312.959410] PM: Suspending system (mem)
so my questions :
Why PM intered to sleep， how to close it.
We have deplay almost 100 pcs in our factory with the same system, only two pcs have this issue.
Hoping you can give me replay.
dmesg.txt (121.5 KB)