Réveil immédiat après suspension

Mon système Debian 9 se réveille en 2 à 5 secondes après son entrée en mode veille (suspension sur RAM) manuellement ou automatiquement. Le problème se produit toujours quelle que soit la façon dont le mode veille est invoqué: par la fermeture du couvercle, par le bouton d'alimentation ou à partir du terminal. Quel pourrait être le problème?

Voici les informations système:

$ sudo dmidecode | grep -A3 '^System Information'
System Information
    Manufacturer: LENOVO
    Product Name: 20ET004LGE
    Version: ThinkPad E460
$ uname -a
Linux 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u5 (2017-09-19) x86_64 GNU/Linux

Pour vérifier quels appareils pourraient causer un problème, j'ai vérifié /proc/acpi/wakeuppuis désactivé temporairement chaque appareil en émettant echo DeviceName > /proc/acpi/wakeup, mais le problème persiste. Le voici avant de changer:

$ cat /proc/acpi/wakeup 
Device  S-state   Status   Sysfs node
LID   S4    *enabled   platform:PNP0C0D:00
SLPB      S3    *enabled   platform:PNP0C0E:00
IGBE      S4    *enabled   pci:0000:00:1f.6
PXSX      S4    *disabled
PXSX      S4    *disabled  pci:0000:01:00.0
PXSX      S4    *disabled  pci:0000:02:00.0
        *disabled  platform:rtsx_pci_sdmmc.0
        *disabled  platform:rtsx_pci_ms.0
XHCI      S3    *enabled   pci:0000:00:14.0

$ lspci
    00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 08)
    00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
    00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
    00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
    00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
    00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
    00:1c.0 PCI bridge: Intel Corporation Device 9d12 (rev f1)
    00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1)
    00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)
    00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
    00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
    00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
    00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection I219-V (rev 21)
    01:00.0 Network controller: Intel Corporation Intel Dual Band Wireless-AC 3165 Plus Bluetooth (rev 99)
    02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)

Et enfin, voici la partie pertinente de dmesg, après avoir mis la machine en veille et elle se réveille (sans aucune modification /proc/acpi/wakeup):

$ sudo dmesg
[ 2591.034943] wlp1s0: deauthenticating from a4:2b:b0:ab:e2:99 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 2591.044024] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 2593.048689] PM: Syncing filesystems ... done.
[ 2593.071217] PM: Preparing system for sleep (mem)
[ 2593.071490] (NULL device *): firmware: direct-loading firmware i915/skl_dmc_ver1_26.bin
[ 2593.071864] (NULL device *): firmware: direct-loading firmware iwlwifi-7265D-22.ucode
[ 2593.071880] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 2593.074134] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 2593.075457] PM: Suspending system (mem)
[ 2593.075519] Suspending console(s) (use no_console_suspend to debug)
[ 2593.075955] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 2593.077328] sd 0:0:0:0: [sda] Stopping disk
[ 2593.264951] ACPI : EC: event blocked
[ 2593.313967] PM: suspend of devices complete after 238.174 msecs
[ 2593.336883] PM: late suspend of devices complete after 22.910 msecs
[ 2593.337306] ACPI : EC: interrupt blocked
[ 2593.338237] xhci_hcd 0000:00:14.0: System wakeup enabled by ACPI
[ 2593.378029] PM: noirq suspend of devices complete after 41.142 msecs
[ 2593.378652] ACPI: Preparing to enter system sleep state S3
[ 2593.399563] ACPI : EC: EC stopped
[ 2593.399564] PM: Saving platform NVS memory
[ 2593.399570] Disabling non-boot CPUs ...
[ 2593.400953] smpboot: CPU 1 is now offline
[ 2593.403402] smpboot: CPU 2 is now offline
[ 2593.405121] smpboot: CPU 3 is now offline
[ 2593.408016] ACPI: Low-level resume complete
[ 2593.408131] ACPI : EC: EC started
[ 2593.408131] PM: Restoring platform NVS memory
[ 2593.408865] Suspended for 3.452 seconds
[ 2593.410052] Enabling non-boot CPUs ...
[ 2593.410111] x86: Booting SMP configuration:
[ 2593.410111] smpboot: Booting Node 0 Processor 1 APIC 0x2
[ 2593.413738]  cache: parent cpu1 should not be sleeping
[ 2593.418428] CPU1 is up
[ 2593.418467] smpboot: Booting Node 0 Processor 2 APIC 0x1
[ 2593.421003]  cache: parent cpu2 should not be sleeping
[ 2593.425788] CPU2 is up
[ 2593.425826] smpboot: Booting Node 0 Processor 3 APIC 0x3
[ 2593.428373]  cache: parent cpu3 should not be sleeping
[ 2593.433092] CPU3 is up
[ 2593.436236] ACPI: Waking up from system sleep state S3
[ 2593.480811] ACPI : EC: interrupt unblocked
[ 2593.536245] xhci_hcd 0000:00:14.0: System wakeup disabled by ACPI
[ 2593.536310] PM: noirq resume of devices complete after 55.607 msecs
[ 2593.541114] PM: early resume of devices complete after 4.771 msecs
[ 2593.541223] ACPI : EC: event unblocked
[ 2593.541548] iwlwifi 0000:01:00.0: RF_KILL bit toggled to enable radio.
[ 2593.542111] sd 0:0:0:0: [sda] Starting disk
[ 2593.542645] rtc_cmos 00:02: System wakeup disabled by ACPI
[ 2593.548069] [drm] GuC firmware load skipped
[ 2593.768567] usb 1-7: reset high-speed USB device number 2 using xhci_hcd
[ 2593.856890] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 2593.857497] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
[ 2593.857500] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[ 2593.857545] ata1.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded
[ 2593.857767] ata1.00: supports DRM functions and may not be fully accessible
[ 2593.859546] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
[ 2593.859548] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[ 2593.859591] ata1.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded
[ 2593.859806] ata1.00: supports DRM functions and may not be fully accessible
[ 2593.860711] ata1.00: configured for UDMA/133
[ 2594.130430] PM: resume of devices complete after 589.312 msecs
[ 2594.130711] PM: Finishing wakeup.
[ 2594.130712] Restarting tasks ... 
[ 2594.132323] [drm] RC6 on
[ 2594.133646] done.
[ 2594.754297] e1000e: enp0s31f6 NIC Link is Down
[ 2594.756068] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[ 2594.969138] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[ 2594.972566] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 2594.974923] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2594.975229] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.043353] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.043657] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.064475] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 2595.074769] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.075066] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.140447] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.140753] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[ 2595.156361] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 2595.237719] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 2598.905323] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 2598.986638] wlp1s0: authenticate with a4:2b:b0:ab:e2:99
[ 2598.990338] wlp1s0: send auth to a4:2b:b0:ab:e2:99 (try 1/3)
[ 2598.992121] wlp1s0: authenticated
[ 2598.996133] wlp1s0: associate with a4:2b:b0:ab:e2:99 (try 1/3)
[ 2598.999926] wlp1s0: RX AssocResp from a4:2b:b0:ab:e2:99 (capab=0x431 status=0 aid=1)
[ 2599.003864] wlp1s0: associated
[ 2599.003986] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready

Je ne sais pas si vous avez résolu ce problème, mais j'ai eu la même chose sur Debian buster / sid sur un ThinkPad T460. La sortie de mon dmesgn'était pas identique à la vôtre, mais surtout, elle avait le même

ACPI: EC: event blocked

ligne. Par ce fil sur AskUbuntu , j'ai désactivé XHCI comme déclencheur de réveil dans /proc/acpi/wakeup:

$ grep enabled /proc/acpi/wakeup | cut -f 1
LID
SLPB
XHCI
$ sudo su
# echo XHCI > /proc/acpi/wakeup

et cela m'a arrangé. Curieusement, cela n'était censé avoir de l'importance que si des périphériques USB étaient branchés sur la machine, mais je ne l'ai certainement pas fait.

EDIT: Peu importe, j'ai oublié la partie où vous avez essayé de désactiver chaque ligne /proc/acpi/wakeup.

Problème résolu. C'était en quelque sorte le clavier. Une de mes clés F était cassée et j'ai décidé de tester si cette clé envoyait constamment des entrées. Ensuite, j'ai testé les entrées du clavier dans le terminal - aucune entrée n'a été affichée lorsque je ne touche pas le clavier. Bien que ce fut le cas, lorsque j'ai remplacé le clavier par un nouveau, j'ai pu mettre le PC en veille. Cela pourrait être lié au BIOS Thinkpad, je suppose, car peu importe ce que j'ai essayé dans le système d'exploitation, je ne pouvais voir aucune entrée de clavier qui pourrait le réveiller du sommeil.