Xubuntu 16.04 suspendendo aleatoriamente

Question

Eu instalei recentemente o Xubuntu 16.04 no meu sistema, junto com o Windows 7. A instalação / live USB funcionou bem sem problemas.

No entanto, meu sistema suspende irregularmente sem aviso. Nenhum dado é perdido, mas a suspensão aproximadamente a cada 2 minutos é muito irritante.

Este é um laptop 32-bit muito antigo, com sem bateria interna , processador Pentium 4, placa gráfica ATI Radeon. Funciona muito bem, exceto por este pequeno problema.

Como corrijo isso?

UPDATE: Aparentemente, usar systemd-inhibit resolve isso, mas apenas enquanto está em execução.

Aqui estão alguns resultados de dmesg :

[ 1014.283131] PM: Syncing filesystems ... done.
[ 1015.409901] PM: Preparing system for sleep (mem)
[ 1015.410185] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 1015.412911] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 1015.414307] PM: Suspending system (mem)
[ 1015.414337] Suspending console(s) (use no_console_suspend to debug)
[ 1015.414766] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 1015.790285] sd 0:0:0:0: [sda] Stopping disk
[ 1016.178846] PM: suspend of devices complete after 764.219 msecs
[ 1016.179369] PM: late suspend of devices complete after 0.516 msecs
[ 1016.180038] ohci-pci 0000:00:13.1: System wakeup enabled by ACPI
[ 1016.180048] ehci-pci 0000:00:13.2: System wakeup enabled by ACPI
[ 1016.180072] ohci-pci 0000:00:13.0: System wakeup enabled by ACPI
[ 1016.196043] PM: noirq suspend of devices complete after 16.668 msecs
[ 1016.196225] ACPI: Preparing to enter system sleep state S3
[ 1016.197296] ACPI : EC: EC stopped
[ 1016.197299] PM: Saving platform NVS memory
[ 1016.197372] Disabling non-boot CPUs ...
[ 1016.197699] Broke affinity for irq 1
[ 1016.197705] Broke affinity for irq 9
[ 1016.197709] Broke affinity for irq 12
[ 1016.197712] Broke affinity for irq 14
[ 1016.197714] Broke affinity for irq 15
[ 1016.197718] Broke affinity for irq 16
[ 1016.197721] Broke affinity for irq 17
[ 1016.197725] Broke affinity for irq 18
[ 1016.197728] Broke affinity for irq 19
[ 1016.198943] smpboot: CPU 1 is now offline
[ 1016.208365] ACPI: Low-level resume complete
[ 1016.208365] ACPI : EC: EC started
[ 1016.208365] PM: Restoring platform NVS memory
[ 1016.208365] Enabling non-boot CPUs ...
[ 1016.228650] x86: Booting SMP configuration:
[ 1016.228653] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 1016.198774] Initializing CPU#1
[ 1016.242484]  cache: parent cpu1 should not be sleeping
[ 1016.243003] CPU1 is up
[ 1016.244592] ACPI: Waking up from system sleep state S3
[ 1016.245621] ohci-pci 0000:00:13.0: System wakeup disabled by ACPI
[ 1016.245672] ohci-pci 0000:00:13.1: System wakeup disabled by ACPI
[ 1016.260277] ehci-pci 0000:00:13.2: System wakeup disabled by ACPI
[ 1016.260455] PM: noirq resume of devices complete after 15.044 msecs
[ 1016.260920] PM: early resume of devices complete after 0.425 msecs
[ 1016.265353] [drm] AGP mode requested: 8
[ 1016.265362] agpgart-ati 0000:00:00.0: AGP 3.0 bridge
[ 1016.265386] agpgart-ati 0000:00:00.0: putting AGP V3 device into 8x mode
[ 1016.265421] radeon 0000:01:05.0: putting AGP V3 device into 8x mode
[ 1016.265472] radeon 0000:01:05.0: GTT: 32M 0xD2000000 - 0xD3FFFFFF
[ 1016.266034] sd 0:0:0:0: [sda] Starting disk
[ 1016.276516] radeon 0000:01:05.0: WB disabled
[ 1016.276525] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000d2000000 and cpu addr 0xf8428000
[ 1016.276572] [drm] radeon: ring at 0x00000000D2001000
[ 1016.276623] ACPI Error: No handler for Region [ECR_] (f6434960) [EmbeddedControl] (20150930/evregion-163)
[ 1016.276628] ACPI Error: Region EmbeddedControl (ID=3) has no handler (20150930/exfldio-297)
[ 1016.276646] ACPI Error: Method parse/execution failed [\_SB.EPWR.PCLK] (Node f6488858), AE_NOT_EXIST (20150930/psparse-542)
[ 1016.276662] ACPI Error: Method parse/execution failed [\_SB.PCI0.LPC0.EC0._Q1E] (Node f648e930), AE_NOT_EXIST (20150930/psparse-542)
[ 1016.276689] [drm] ring test succeeded in 0 usecs
[ 1016.276708] [drm] ib test succeeded in 0 usecs
[ 1016.292149] rtc_cmos 00:00: System wakeup disabled by ACPI
[ 1016.320062] usb usb3: root hub lost power or was reset
[ 1016.324093] usb usb2: root hub lost power or was reset
[ 1016.489106] ata2.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1016.489111] ata2.00: ACPI cmd ef/03:42:00:00:00:a0 (SET FEATURES) filtered out
[ 1016.504639] ata2.00: configured for UDMA/33
[ 1016.608212] PM: resume of devices complete after 347.276 msecs
[ 1016.609709] PM: Finishing wakeup.
[ 1016.609712] Restarting tasks ... done.
[ 1016.824199] firewire_core 0000:02:00.0: rediscovered device fw0
[ 1017.384432] ata1.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1017.384447] ata1.00: ACPI cmd ef/03:45:00:00:00:a0 (SET FEATURES) filtered out
[ 1017.392629] ata1.00: configured for UDMA/100
[ 1017.521001] IPv6: ADDRCONF(NETDEV_UP): enp2s3: link is not ready
[ 1017.521223] 8139too 0000:02:03.0 enp2s3: link down
[ 1017.522491] IPv6: ADDRCONF(NETDEV_UP): enp2s3: link is not ready
[ 1017.543690] IPv6: ADDRCONF(NETDEV_UP): wlp2s2: link is not ready
[ 1017.568506] IPv6: ADDRCONF(NETDEV_UP): wlp2s2: link is not ready
[ 1017.689485] IPv6: ADDRCONF(NETDEV_UP): wlp2s2: link is not ready
[ 1045.519238] PM: Syncing filesystems ... done.
[ 1046.362006] PM: Preparing system for sleep (mem)
[ 1046.362307] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 1046.365094] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 1046.366520] PM: Suspending system (mem)
[ 1046.366553] Suspending console(s) (use no_console_suspend to debug)
[ 1046.366999] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 1046.581747] sd 0:0:0:0: [sda] Stopping disk
[ 1046.966257] PM: suspend of devices complete after 599.412 msecs
[ 1046.966777] PM: late suspend of devices complete after 0.514 msecs
[ 1046.967410] ehci-pci 0000:00:13.2: System wakeup enabled by ACPI
[ 1046.967412] ohci-pci 0000:00:13.1: System wakeup enabled by ACPI
[ 1046.967443] ohci-pci 0000:00:13.0: System wakeup enabled by ACPI
[ 1046.980119] PM: noirq suspend of devices complete after 13.337 msecs
[ 1046.980301] ACPI: Preparing to enter system sleep state S3
[ 1046.981366] ACPI : EC: EC stopped
[ 1046.981368] PM: Saving platform NVS memory
[ 1046.981437] Disabling non-boot CPUs ...
[ 1046.981755] Broke affinity for irq 1
[ 1046.981761] Broke affinity for irq 9
[ 1046.981765] Broke affinity for irq 12
[ 1046.981768] Broke affinity for irq 14
[ 1046.981771] Broke affinity for irq 15
[ 1046.981774] Broke affinity for irq 16
[ 1046.981777] Broke affinity for irq 17
[ 1046.981781] Broke affinity for irq 18
[ 1046.981784] Broke affinity for irq 19
[ 1046.982998] smpboot: CPU 1 is now offline
[ 1046.992360] ACPI: Low-level resume complete
[ 1046.992360] ACPI : EC: EC started
[ 1046.992360] PM: Restoring platform NVS memory
[ 1046.992360] Enabling non-boot CPUs ...
[ 1047.012660] x86: Booting SMP configuration:
[ 1047.012663] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 1046.982830] Initializing CPU#1
[ 1047.026628]  cache: parent cpu1 should not be sleeping
[ 1047.027161] CPU1 is up
[ 1047.028767] ACPI: Waking up from system sleep state S3
[ 1047.029800] ohci-pci 0000:00:13.0: System wakeup disabled by ACPI
[ 1047.029854] ohci-pci 0000:00:13.1: System wakeup disabled by ACPI
[ 1047.044225] ehci-pci 0000:00:13.2: System wakeup disabled by ACPI
[ 1047.044489] PM: noirq resume of devices complete after 14.901 msecs
[ 1047.044949] PM: early resume of devices complete after 0.420 msecs
[ 1047.045430] [drm] AGP mode requested: 8
[ 1047.045439] agpgart-ati 0000:00:00.0: AGP 3.0 bridge
[ 1047.045460] agpgart-ati 0000:00:00.0: putting AGP V3 device into 8x mode
[ 1047.045495] radeon 0000:01:05.0: putting AGP V3 device into 8x mode
[ 1047.045545] radeon 0000:01:05.0: GTT: 32M 0xD2000000 - 0xD3FFFFFF
[ 1047.049858] sd 0:0:0:0: [sda] Starting disk
[ 1047.056122] radeon 0000:01:05.0: WB disabled
[ 1047.056131] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000d2000000 and cpu addr 0xf8428000
[ 1047.056199] [drm] radeon: ring at 0x00000000D2001000
[ 1047.056250] [drm] ring test succeeded in 0 usecs
[ 1047.056268] [drm] ib test succeeded in 0 usecs
[ 1047.076150] rtc_cmos 00:00: System wakeup disabled by ACPI
[ 1047.076248] ACPI Error: No handler for Region [ECR_] (f6434960) [EmbeddedControl] (20150930/evregion-163)
[ 1047.076256] ACPI Error: Region EmbeddedControl (ID=3) has no handler (20150930/exfldio-297)
[ 1047.076275] ACPI Error: Method parse/execution failed [\_SB.EPWR.PCLK] (Node f6488858), AE_NOT_EXIST (20150930/psparse-542)
[ 1047.076295] ACPI Error: Method parse/execution failed [\_SB.PCI0.LPC0.EC0._Q1E] (Node f648e930), AE_NOT_EXIST (20150930/psparse-542)
[ 1047.104061] usb usb3: root hub lost power or was reset
[ 1047.108091] usb usb2: root hub lost power or was reset
[ 1047.273139] ata2.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1047.273147] ata2.00: ACPI cmd ef/03:42:00:00:00:a0 (SET FEATURES) filtered out
[ 1047.288677] ata2.00: configured for UDMA/33
[ 1047.392181] PM: resume of devices complete after 347.217 msecs
[ 1047.393619] PM: Finishing wakeup.
[ 1047.393622] Restarting tasks ... done.
[ 1075.800446] PM: Syncing filesystems ... done.
[ 1076.445031] PM: Preparing system for sleep (mem)
[ 1076.445281] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 1076.448090] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 1076.449524] PM: Suspending system (mem)
[ 1076.449556] Suspending console(s) (use no_console_suspend to debug)
[ 1076.449985] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 1076.568319] sd 0:0:0:0: [sda] Stopping disk
[ 1076.964074] PM: suspend of devices complete after 514.226 msecs
[ 1076.964645] PM: late suspend of devices complete after 0.564 msecs
[ 1076.965284] ehci-pci 0000:00:13.2: System wakeup enabled by ACPI
[ 1076.965287] ohci-pci 0000:00:13.1: System wakeup enabled by ACPI
[ 1076.965331] ohci-pci 0000:00:13.0: System wakeup enabled by ACPI
[ 1076.980131] PM: noirq suspend of devices complete after 15.480 msecs
[ 1076.980297] ACPI: Preparing to enter system sleep state S3
[ 1076.981428] ACPI : EC: EC stopped
[ 1076.981430] PM: Saving platform NVS memory
[ 1076.981503] Disabling non-boot CPUs ...
[ 1076.981874] Broke affinity for irq 1
[ 1076.981880] Broke affinity for irq 9
[ 1076.981884] Broke affinity for irq 12
[ 1076.981887] Broke affinity for irq 14
[ 1076.981889] Broke affinity for irq 15
[ 1076.981893] Broke affinity for irq 16
[ 1076.981896] Broke affinity for irq 17
[ 1076.981900] Broke affinity for irq 18
[ 1076.981903] Broke affinity for irq 19
[ 1076.983098] smpboot: CPU 1 is now offline
[ 1076.992365] ACPI: Low-level resume complete
[ 1076.992365] ACPI : EC: EC started
[ 1076.992365] PM: Restoring platform NVS memory
[ 1076.992365] Enabling non-boot CPUs ...
[ 1077.012654] x86: Booting SMP configuration:
[ 1077.012657] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 1076.982929] Initializing CPU#1
[ 1077.026510]  cache: parent cpu1 should not be sleeping
[ 1077.027030] CPU1 is up
[ 1077.028623] ACPI: Waking up from system sleep state S3
[ 1077.029656] ohci-pci 0000:00:13.0: System wakeup disabled by ACPI
[ 1077.029709] ohci-pci 0000:00:13.1: System wakeup disabled by ACPI
[ 1077.044265] ehci-pci 0000:00:13.2: System wakeup disabled by ACPI
[ 1077.044506] PM: noirq resume of devices complete after 15.062 msecs
[ 1077.044962] PM: early resume of devices complete after 0.415 msecs
[ 1077.045429] [drm] AGP mode requested: 8
[ 1077.045438] agpgart-ati 0000:00:00.0: AGP 3.0 bridge
[ 1077.045460] agpgart-ati 0000:00:00.0: putting AGP V3 device into 8x mode
[ 1077.045494] radeon 0000:01:05.0: putting AGP V3 device into 8x mode
[ 1077.045544] radeon 0000:01:05.0: GTT: 32M 0xD2000000 - 0xD3FFFFFF
[ 1077.049859] sd 0:0:0:0: [sda] Starting disk
[ 1077.056092] radeon 0000:01:05.0: WB disabled
[ 1077.056101] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000d2000000 and cpu addr 0xf8428000
[ 1077.056151] [drm] radeon: ring at 0x00000000D2001000
[ 1077.056194] [drm] ring test succeeded in 0 usecs
[ 1077.056214] [drm] ib test succeeded in 0 usecs
[ 1077.076155] rtc_cmos 00:00: System wakeup disabled by ACPI
[ 1077.104062] usb usb3: root hub lost power or was reset
[ 1077.108092] usb usb2: root hub lost power or was reset
[ 1077.137214] ACPI Error: No handler for Region [ECR_] (f6434960) [EmbeddedControl] (20150930/evregion-163)
[ 1077.137220] ACPI Error: Region EmbeddedControl (ID=3) has no handler (20150930/exfldio-297)
[ 1077.137236] ACPI Error: Method parse/execution failed [\_SB.EPWR.PCLK] (Node f6488858), AE_NOT_EXIST (20150930/psparse-542)
[ 1077.137250] ACPI Error: Method parse/execution failed [\_SB.PCI0.LPC0.EC0._Q1E] (Node f648e930), AE_NOT_EXIST (20150930/psparse-542)
[ 1077.273103] ata2.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1077.273109] ata2.00: ACPI cmd ef/03:42:00:00:00:a0 (SET FEATURES) filtered out
[ 1077.288644] ata2.00: configured for UDMA/33
[ 1077.392243] PM: resume of devices complete after 347.267 msecs
[ 1077.392736] PM: Finishing wakeup.
[ 1077.392741] Restarting tasks ... done.
[ 1077.608070] firewire_core 0000:02:00.0: rediscovered device fw0
[ 1078.224382] ata1.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1078.224395] ata1.00: ACPI cmd ef/03:45:00:00:00:a0 (SET FEATURES) filtered out
[ 1078.232441] ata1.00: configured for UDMA/100
[ 1078.354863] IPv6: ADDRCONF(NETDEV_UP): enp2s3: link is not ready
[ 1078.355181] 8139too 0000:02:03.0 enp2s3: link down
[ 1078.356347] IPv6: ADDRCONF(NETDEV_UP): enp2s3: link is not ready
[ 1078.363688] IPv6: ADDRCONF(NETDEV_UP): wlp2s2: link is not ready
[ 1078.380653] IPv6: ADDRCONF(NETDEV_UP): wlp2s2: link is not ready
[ 1078.491391] IPv6: ADDRCONF(NETDEV_UP): wlp2s2: link is not ready
[ 1106.025577] PM: Syncing filesystems ... done.
[ 1106.687382] PM: Preparing system for sleep (mem)
[ 1106.687634] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 1106.690456] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 1106.691908] PM: Suspending system (mem)
[ 1106.691942] Suspending console(s) (use no_console_suspend to debug)
[ 1106.692425] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 1106.854914] sd 0:0:0:0: [sda] Stopping disk
[ 1107.244443] PM: suspend of devices complete after 552.160 msecs
[ 1107.244985] PM: late suspend of devices complete after 0.535 msecs
[ 1107.245644] ohci-pci 0000:00:13.1: System wakeup enabled by ACPI
[ 1107.245647] ehci-pci 0000:00:13.2: System wakeup enabled by ACPI
[ 1107.245676] ohci-pci 0000:00:13.0: System wakeup enabled by ACPI
[ 1107.260122] PM: noirq suspend of devices complete after 15.131 msecs
[ 1107.260287] ACPI: Preparing to enter system sleep state S3
[ 1107.261420] ACPI : EC: EC stopped
[ 1107.261423] PM: Saving platform NVS memory
[ 1107.261505] Disabling non-boot CPUs ...
[ 1107.261878] Broke affinity for irq 1
[ 1107.261884] Broke affinity for irq 9
[ 1107.261888] Broke affinity for irq 12
[ 1107.261891] Broke affinity for irq 14
[ 1107.261894] Broke affinity for irq 15
[ 1107.261897] Broke affinity for irq 16
[ 1107.261900] Broke affinity for irq 17
[ 1107.261904] Broke affinity for irq 18
[ 1107.261907] Broke affinity for irq 19
[ 1107.263102] smpboot: CPU 1 is now offline
[ 1107.272362] ACPI: Low-level resume complete
[ 1107.272362] ACPI : EC: EC started
[ 1107.272362] PM: Restoring platform NVS memory
[ 1107.272362] Enabling non-boot CPUs ...
[ 1107.292650] x86: Booting SMP configuration:
[ 1107.292653] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 1107.262934] Initializing CPU#1
[ 1107.306573]  cache: parent cpu1 should not be sleeping
[ 1107.307089] CPU1 is up
[ 1107.308680] ACPI: Waking up from system sleep state S3
[ 1107.309713] ohci-pci 0000:00:13.0: System wakeup disabled by ACPI
[ 1107.309764] ohci-pci 0000:00:13.1: System wakeup disabled by ACPI
[ 1107.324263] ehci-pci 0000:00:13.2: System wakeup disabled by ACPI
[ 1107.324463] PM: noirq resume of devices complete after 14.962 msecs
[ 1107.324923] PM: early resume of devices complete after 0.420 msecs
[ 1107.329288] [drm] AGP mode requested: 8
[ 1107.329297] agpgart-ati 0000:00:00.0: AGP 3.0 bridge
[ 1107.329320] agpgart-ati 0000:00:00.0: putting AGP V3 device into 8x mode
[ 1107.329355] radeon 0000:01:05.0: putting AGP V3 device into 8x mode
[ 1107.329408] radeon 0000:01:05.0: GTT: 32M 0xD2000000 - 0xD3FFFFFF
[ 1107.330217] sd 0:0:0:0: [sda] Starting disk
[ 1107.340572] radeon 0000:01:05.0: WB disabled
[ 1107.340581] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000d2000000 and cpu addr 0xf8428000
[ 1107.340649] [drm] radeon: ring at 0x00000000D2001000
[ 1107.340777] [drm] ring test succeeded in 0 usecs
[ 1107.340795] [drm] ib test succeeded in 0 usecs
[ 1107.360696] ACPI Error: No handler for Region [ECR_] (f6434960) [EmbeddedControl] (20150930/evregion-163)
[ 1107.360701] ACPI Error: Region EmbeddedControl (ID=3) has no handler (20150930/exfldio-297)
[ 1107.360719] ACPI Error: Method parse/execution failed [\_SB.EPWR.PCLK] (Node f6488858), AE_NOT_EXIST (20150930/psparse-542)
[ 1107.360733] ACPI Error: Method parse/execution failed [\_SB.PCI0.LPC0.EC0._Q1E] (Node f648e930), AE_NOT_EXIST (20150930/psparse-542)
[ 1107.364161] rtc_cmos 00:00: System wakeup disabled by ACPI
[ 1107.384062] usb usb3: root hub lost power or was reset
[ 1107.388091] usb usb2: root hub lost power or was reset
[ 1107.553149] ata2.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1107.553155] ata2.00: ACPI cmd ef/03:42:00:00:00:a0 (SET FEATURES) filtered out
[ 1107.568678] ata2.00: configured for UDMA/33
[ 1107.672334] PM: resume of devices complete after 347.395 msecs
[ 1107.673318] PM: Finishing wakeup.
[ 1107.673321] Restarting tasks ... done.
[ 1107.920090] firewire_core 0000:02:00.0: rediscovered device fw0
[ 1108.504383] ata1.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 1108.504397] ata1.00: ACPI cmd ef/03:45:00:00:00:a0 (SET FEATURES) filtered out

    

Answer 1

Para dar crédito onde é devido: encontrei a solução nos fóruns do Ubuntu MATE e Arch Linux.

Veja a linha de base: parece que systemd está fazendo com que nossos sistemas sejam suspensos. Eu não tenho ideia do porquê, ou se será corrigido. Mas no momento, aqui está a solução:

1. Antes de fazer qualquer outra coisa, você pode tentar executar systemd-inhibit dentro da GUI para evitar as suspensões, mas isso nem sempre funciona.
2. Em um editor de texto (com raiz), abra /etc/systemd/logind.conf
3. Localize a opção HandleLidSwitch e altere-a de suspend para ignore .

     

   OBSERVAÇÃO: não tenho certeza se você terá que adicionar essa opção ou descomentar, você terá que tentar e ver o que acontece.

4. Reinicialize o computador e o problema deve ser resolvido.

O que isto faz é forçar o systemd a ignorar o "switch de tampa" (entre aspas porque não é um switch quebrado, mas aparentemente um bug no systemd ). Isso pode impedir a suspensão através da tampa, mas eu nunca uso esse recurso de qualquer maneira e sempre prefiro suspender com o botão liga / desliga ou menu.