更新：所以我找到了这个问题。看起来 nvidia 卡在暂停之前就启动了。这是 bbswitch 的预期行为：
[4195.214014]bbswitch：启用独立显卡
但由于某种原因，该卡在暂停期间没有断电，因此会耗尽电池电量。
即使我删除 bbswitch 模块并禁用 bumblebee，也会出现问题。
想法？
我买了一台新机器，它在睡眠期间会消耗不成比例的电池电量：约 12%/小时。这不是电池问题，因为系统正常使用可以使用近 5 小时。肯定有什么问题。另外，机器在睡眠时会变得很热（比运行时更热！），这让我相信 CPU 无法挂起或 nvidia GPU 在睡眠前打开？我在 dmesg 上找不到任何可疑的东西：
[ 4195.095123] IPv6: ADDRCONF(NETDEV_UP): enp3s0f1: link is not ready
[ 4195.127994] wlp4s0: deauthenticating from c8:91:f9:14:33:ac by local choice (Reason: 3=DEAUTH_LEAVING)
[ 4195.134796] cfg80211: Calling CRDA to update world regulatory domain
[ 4195.159421] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[ 4195.164435] PM: Syncing filesystems ... done.
[ 4195.213683] PM: Preparing system for mem sleep
[ 4195.214014] bbswitch: enabling discrete graphics
[ 4195.552620] Freezing user space processes ... (elapsed 0.001 seconds) done.
[ 4195.554162] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 4195.555300] PM: Entering mem sleep
[ 4195.555309] Suspending console(s) (use no_console_suspend to debug)
[ 4195.555541] sd 1:0:0:0: [sdb] Synchronizing SCSI cache
[ 4195.555580] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 4195.556794] sd 0:0:0:0: [sda] Stopping disk
[ 4195.557634] sd 1:0:0:0: [sdb] Stopping disk
[ 4196.586213] PM: suspend of devices complete after 1030.142 msecs
[ 4196.612933] ------------[ cut here ]------------
[ 4196.612968] WARNING: CPU: 0 PID: 6117 at drivers/gpu/drm/i915/intel_display.c:7904 hsw_enable_pc8+0x649/0x7b0 [i915]()
[ 4196.612968] SPLL enabled
[ 4196.612991] Modules linked in: nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 dns_resolver cpufreq_stats mmc_block ctr ccm joydev mousedev arc4 nls_iso8859_1 nls_cp437 vfat fat intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel iTCO_wdt iTCO_vendor_support mxm_wmi kvm iwlmvm snd_hda_codec_hdmi btusb uvcvideo crct10dif_pclmul videobuf2_vmalloc crc32_pclmul videobuf2_memops mac80211 videobuf2_core bluetooth v4l2_common videodev crc16 media ghash_clmulni_intel snd_hda_codec_realtek aesni_intel snd_hda_codec_generic aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd iwlwifi rtsx_pci_ms memstick r8169 cfg80211 snd_soc_rt5640 snd_soc_rl6231 rfkill snd_hda_intel snd_hda_controller psmouse snd_hda_codec snd_soc_core mii serio_raw mei_me pcspkr i2c_i801 ie31200_edac snd_compress
[ 4196.613014] mei shpchp lpc_ich edac_core snd_hwdep thermal battery snd_pcm_dmaengine snd_pcm snd_timer snd wmi i2c_hid soundcore hid regmap_i2c dw_dmac dw_dmac_core i2c_designware_platform gpio_lynxpoint tpm_crb i2c_designware_core evdev 8250_dw spi_pxa2xx_platform snd_soc_sst_acpi tpm mac_hid ac processor sch_fq_codel coretemp msr nfs lockd grace sunrpc fscache ip_tables x_tables sd_mod rtsx_pci_sdmmc atkbd libps2 ahci libahci libata ehci_pci xhci_pci xhci_hcd ehci_hcd scsi_mod rtsx_pci usbcore usb_common i8042 serio sdhci_acpi sdhci led_class mmc_core bbswitch(O) intel_agp i915 button i2c_algo_bit video drm_kms_helper drm i2c_core intel_gtt crc32c_generic crc32c_intel btrfs xor raid6_pq
[ 4196.613016] CPU: 0 PID: 6117 Comm: kworker/u16:5 Tainted: G W O 4.0.7-2-ARCH #1
[ 4196.613017] Hardware name: Clevo P65_P67SE /P65_P67SE , BIOS 1.03.09 03/05/2015
[ 4196.613021] Workqueue: events_unbound async_run_entry_fn
[ 4196.613023] 0000000000000000 0000000020544442 ffff88037f4e3bd8 ffffffff81574ec3
[ 4196.613024] 0000000000000000 ffff88037f4e3c30 ffff88037f4e3c18 ffffffff81074e7a
[ 4196.613025] 000000010011d370 ffff8800c87d0000 ffff8800c87a0360 ffff8800c87a0370
[ 4196.613026] Call Trace:
[ 4196.613030] [<ffffffff81574ec3>] dump_stack+0x4c/0x6e
[ 4196.613034] [<ffffffff81074e7a>] warn_slowpath_common+0x8a/0xc0
[ 4196.613035] [<ffffffff81074f05>] warn_slowpath_fmt+0x55/0x70
[ 4196.613052] [<ffffffffa027d039>] hsw_enable_pc8+0x649/0x7b0 [i915]
[ 4196.613059] [<ffffffffa020df40>] intel_suspend_complete+0xe0/0x6d0 [i915]
[ 4196.613066] [<ffffffffa020e552>] i915_drm_suspend_late+0x22/0x90 [i915]
[ 4196.613074] [<ffffffffa020e6d0>] ? i915_pm_poweroff_late+0x40/0x40 [i915]
[ 4196.613081] [<ffffffffa020e6f7>] i915_pm_suspend_late+0x27/0x40 [i915]
[ 4196.613083] [<ffffffff813f3a6e>] dpm_run_callback+0x4e/0x160
[ 4196.613085] [<ffffffff813f4500>] __device_suspend_late+0xd0/0x1c0
[ 4196.613086] [<ffffffff813f460f>] async_suspend_late+0x1f/0xa0
[ 4196.613088] [<ffffffff81095ebc>] async_run_entry_fn+0x4c/0x170
[ 4196.613090] [<ffffffff8108dadb>] process_one_work+0x14b/0x470
[ 4196.613092] [<ffffffff8108e228>] worker_thread+0x48/0x4b0
[ 4196.613094] [<ffffffff8108e1e0>] ? init_pwq.part.7+0x10/0x10
[ 4196.613096] [<ffffffff8108e1e0>] ? init_pwq.part.7+0x10/0x10
[ 4196.613097] [<ffffffff810934b8>] kthread+0xd8/0xf0
[ 4196.613099] [<ffffffff81576a87>] ? schedule+0x37/0x90
[ 4196.613100] [<ffffffff810933e0>] ? kthread_worker_fn+0x170/0x170
[ 4196.613102] [<ffffffff8157a718>] ret_from_fork+0x58/0x90
[ 4196.613103] [<ffffffff810933e0>] ? kthread_worker_fn+0x170/0x170
[ 4196.613105] ---[ end trace 0462ac18f83abc29 ]---
[ 4196.632978] PM: late suspend of devices complete after 46.732 msecs
[ 4196.634053] ehci-pci 0000:00:1a.0: System wakeup enabled by ACPI
[ 4196.634105] xhci_hcd 0000:00:14.0: System wakeup enabled by ACPI
[ 4196.634195] ehci-pci 0000:00:1d.0: System wakeup enabled by ACPI
[ 4196.646328] PM: noirq suspend of devices complete after 13.339 msecs
[ 4196.646594] ACPI: Preparing to enter system sleep state S3
[ 4196.647677] PM: Saving platform NVS memory
[ 4196.647682] Disabling non-boot CPUs ...
[ 4196.647712] intel_pstate CPU 1 exiting
[ 4196.648884] kvm: disabling virtualization on CPU1
[ 4196.648894] smpboot: CPU 1 is now offline
[ 4196.649158] intel_pstate CPU 2 exiting
[ 4196.650323] kvm: disabling virtualization on CPU2
[ 4196.650351] smpboot: CPU 2 is now offline
[ 4196.650647] intel_pstate CPU 3 exiting
[ 4196.651789] kvm: disabling virtualization on CPU3
[ 4196.651794] smpboot: CPU 3 is now offline
[ 4196.652058] intel_pstate CPU 4 exiting
[ 4196.653187] kvm: disabling virtualization on CPU4
[ 4196.653198] smpboot: CPU 4 is now offline
[ 4196.653483] intel_pstate CPU 5 exiting
[ 4196.654589] kvm: disabling virtualization on CPU5
[ 4196.654594] smpboot: CPU 5 is now offline
[ 4196.654890] intel_pstate CPU 6 exiting
[ 4196.655992] kvm: disabling virtualization on CPU6
[ 4196.655996] smpboot: CPU 6 is now offline
[ 4196.656297] intel_pstate CPU 7 exiting
[ 4196.657403] kvm: disabling virtualization on CPU7
[ 4196.657410] smpboot: CPU 7 is now offline
[ 4196.658869] ACPI: Low-level resume complete
[ 4196.658908] PM: Restoring platform NVS memory
[ 4196.659265] Enabling non-boot CPUs ...
[ 4196.659303] x86: Booting SMP configuration:
[ 4196.659304] smpboot: Booting Node 0 Processor 1 APIC 0x2
[ 4196.671284] kvm: enabling virtualization on CPU1
[ 4196.673556] CPU1 is up
[ 4196.673574] smpboot: Booting Node 0 Processor 2 APIC 0x4
[ 4196.685547] kvm: enabling virtualization on CPU2
[ 4196.687842] CPU2 is up
[ 4196.687859] smpboot: Booting Node 0 Processor 3 APIC 0x6
[ 4196.699759] kvm: enabling virtualization on CPU3
[ 4196.701974] CPU3 is up
[ 4196.701990] smpboot: Booting Node 0 Processor 4 APIC 0x1
[ 4196.713823] kvm: enabling virtualization on CPU4
[ 4196.716068] CPU4 is up
[ 4196.716080] smpboot: Booting Node 0 Processor 5 APIC 0x3
[ 4196.727888] kvm: enabling virtualization on CPU5
[ 4196.730054] CPU5 is up
[ 4196.730066] smpboot: Booting Node 0 Processor 6 APIC 0x5
[ 4196.741889] kvm: enabling virtualization on CPU6
[ 4196.744146] CPU6 is up
[ 4196.744158] smpboot: Booting Node 0 Processor 7 APIC 0x7
[ 4196.755988] kvm: enabling virtualization on CPU7
[ 4196.758252] CPU7 is up
[ 4196.763641] ACPI: Waking up from system sleep state S3
[ 4196.764541] acpi LNXPOWER:01: Turning OFF
[ 4196.767964] ehci-pci 0000:00:1a.0: System wakeup disabled by ACPI
[ 4196.767976] ehci-pci 0000:00:1d.0: System wakeup disabled by ACPI
[ 4196.767980] xhci_hcd 0000:00:14.0: System wakeup disabled by ACPI
[ 4196.778689] PM: noirq resume of devices complete after 14.131 msecs
[ 4197.018061] PM: early resume of devices complete after 239.206 msecs
[ 4197.018354] rtc_cmos 00:02: System wakeup disabled by ACPI
[ 4197.018587] sd 0:0:0:0: [sda] Starting disk
[ 4197.018588] sd 1:0:0:0: [sdb] Starting disk
[ 4197.344855] ata3: SATA link down (SStatus 0 SControl 300)
[ 4197.351524] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 4197.352268] ata2.00: configured for UDMA/133
[ 4197.385019] usb 1-4: reset full-speed USB device number 3 using xhci_hcd
[ 4197.558906] usb 1-4: No LPM exit latency info found, disabling LPM.
[ 4197.793332] usb 1-3: reset full-speed USB device number 2 using xhci_hcd
[ 4198.253693] usb 1-10: reset high-speed USB device number 4 using xhci_hcd
[ 4198.475535] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 4198.485939] ata1.00: configured for UDMA/100
[ 4198.600697] PM: resume of devices complete after 1581.666 msecs
[ 4198.601227] PM: Finishing wakeup.
[ 4198.601228] Restarting tasks ... done.
[ 4198.608986] bbswitch: disabling discrete graphics
[ 4198.608999] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150204/nsarguments-95)
[ 4198.615505] Bluetooth: hci0: read Intel version: 370810011003110e00
[ 4198.615510] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.8.10-fw-1.10.3.11.e.bseq
[ 4198.634618] psmouse serio2: synaptics: queried max coordinates: x [..5706], y [..4800]
[ 4198.905731] Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated
[ 4199.141472] r8169 0000:03:00.1 enp3s0f1: link down
[ 4199.142315] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[ 4199.142524] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
有任何想法吗？在 Arch Linux、Intel i7 4720 HQ 和 GTX 970M 上运行