我遇到了以下问题：休眠后（使用sudo systemctl hibernate终端中的命令或Ubuntu桌面右上角的菜单）后，我出现黑屏（即使所有设备似乎都可以使用。风扇正常工作！），我不得不重新启动操作系统，因为恢复失败，我无法回到“保存状态”。的内容etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla是：
[Re-enable hibernate by default in upower]
Identity=unix-user:*
Action=org.freedesktop.upower.hibernate
ResultActive=yes
[Re-enable hibernate by default in logind]
Identity=unix-user:*
Action=org.freedesktop.login1.hibernate;org.freedesktop.login1.handle-hibernate-key;org.freedesktop.login1;org.freedesktop.login1.hibernate-multiple-sessions;org.freedesktop.login1.hibernate-ignore-inhibit
ResultActive=yes
附加信息：Ubuntu版本：16.04LTS
内核版本：
uname -r
4.13.0-26-generic
图形信息：
udo lspci | grep -E 'VGA|Display'
[sudo] password di michele:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] (rev ff)
michele@michele-ubuntu:~$ sudo lshw -c display | grep driver
configuration: driver=i915 latency=0
CPU信息：
sudo lscpu
[sudo] password di michele:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 42
Model name: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
Stepping: 7
CPU MHz: 1995.561
CPU max MHz: 2900,0000
CPU min MHz: 800,0000
BogoMIPS: 3991.12
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 6144K
NUMA node0 CPU(s): 0-7
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm epb pti tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm ida arat pln pts
为什么恢复失败？在此先感谢您的帮助。