Eu tenho um novo Dell Latitude E7440 com o Ubuntu 14.04.2. Às vezes (mas nem sempre), depois de dormir, não consigo retomar, pois depois de tentar retomar um dos seguintes acontece:
O log do kernel mostra alguns erros dos momentos em que tentei ativar o computador:
Apr 8 09:10:18 lati kernel: [22586.645486] ACPI Error: Index value 0x0000000000000083 overflows field width 0x7 (20140424/exfldio-343)
Apr 8 09:10:18 lati kernel: [22586.645489] ACPI Error: Method parse/execution failed [\NEVT] (Node ffff88040e047258), AE_AML_REGISTER_LIMIT (20140424/psparse-536)
Apr 8 09:10:18 lati kernel: [22586.645491] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.ECDV._Q66] (Node ffff88040e044b90), AE_AML_REGISTER_LIMIT (20140424/psparse-536)
e logo após essas mensagens de erro, há um aviso:
Apr 8 09:10:18 lati kernel: [22638.968661] WARNING: CPU: 0 PID: 27214 at /build/buildd/linux-lts-utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324 intel_crtc_wait_for_pending_flips+0x171/0x180 [i915]()
A última mensagem antes do sono foi:
Apr 7 23:42:34 lati kernel: [22578.986188] PM: Preparing system for mem sleep
Você acha que os logs do kernel dão alguma dica para os problemas de sono do meu laptop?
Depois de tentar "dormir" e acordar novamente, o mesmo problema (pode mover o mouse, mas não pode clicar em nada ou digitar nada), mas as mensagens de log foram diferentes desta vez. Esta é uma pequena seleção deles.
A última mensagem antes de dormir:
Apr 8 11:44:08 lati kernel: [ 4736.851598] ahci 0000:00:1f.2: port does not support device sleep
e uma linha depois disso, esta linha mais estranha aparece (no vim; provavelmente indicando uma corrupção do arquivo ou algo assim ..?)
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Apr 8 13:52:03 lati kernel: [ 0.000000] Initializing cgroup subsys cpuset
(a linha atual é muito mais longa ...)
e um pouco mais tarde, este aviso:
Apr 8 13:52:03 lati kernel: [ 0.910836] i8042: Warning: Keylock active
O syslog é bastante semelhante. As duas últimas linhas antes de dormir são assim:
Apr 8 11:44:08 lati kernel: [ 4736.851598] ahci 0000:00:1f.2: port does not support device sleep
Apr 8 11:44:08 lati kernel: [ 4737.399980] init: anacron main process (3054) killed by TERM signal
Em seguida, esta linha ^@ novamente e, finalmente, esses erros e avisos:
Apr 8 13:52:03 lati kernel: [ 0.910836] i8042: Warning: Keylock active
Apr 8 13:52:03 lati kernel: [ 2.724522] systemd-udevd[352]: Error calling EVIOCSKEYCODE: Invalid argument
Apr 8 13:52:03 lati NetworkManager[727]: <warn> failed to allocate link cache: (-12) Object not found
Apr 8 13:52:03 lati NetworkManager[727]: <warn> /sys/devices/virtual/net/lo: couldn't determine device driver; ignoring...
Apr 8 13:52:03 lati NetworkManager[727]: <warn> Trying to remove a non-existant call id.
Apr 8 13:52:05 lati ModemManager[697]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:19.0': not supported by any plugin
Apr 8 13:52:05 lati ModemManager[697]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.3/0000:02:00.0': not supported by any plugin
Apr 8 13:52:08 lati NetworkManager[727]: <warn> dnsmasq not available on the bus, can't update servers.
Apr 8 13:52:08 lati NetworkManager[727]: <error> [1428490328.454641] [nm-dns-dnsmasq.c:396] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
Apr 8 13:52:08 lati NetworkManager[727]: <warn> DNS: plugin dnsmasq update failed
Apr 8 13:52:08 lati dnsmasq[1666]: warning: no upstream servers configured
Apr 8 13:52:08 lati NetworkManager[727]: <warn> dnsmasq appeared on DBus: :1.47
Apr 8 13:52:20 lati ModemManager[697]: <warn> Could not grab port (tty/ttyS4): 'Cannot add port 'tty/ttyS4', unhandled serial type'
Apr 8 13:52:20 lati ModemManager[697]: <warn> Couldn't create modem for device at '/sys/devices/pci0000:00/0000:00:16.3': Failed to find primary AT port
Apr 8 13:52:47 lati gnome-session[2016]: GLib-CRITICAL: g_environ_setenv: assertion 'value != NULL' failed