我想了解为什么当我关闭显示器并重新打开时，我的 Ubuntu 会被注销。我进入隐私设置并关闭了屏幕锁定，但这种情况仍然会发生。我在电源设置中关闭了自动挂起和黑屏关闭。我甚至使用咖啡因来防止任何东西将我注销。当我关闭电视并重新打开时，这种情况仍然会发生。但是，当我使用遥控器更改输入并将其切换回 Ubuntu 时，我仍保持登录状态。
我在一台新买的 PC 上运行 Ubuntu 17.10。它是 i5-8400 coffee lake、4GB RAM、asrock 370m MB，只运行集成 gpu，因为它只用于视频（htpc），并且希望消耗尽可能少的电量。
这是日志，也许某些东西导致了崩溃（如在 ubuntu 论坛其他地方读到的）。
Mar 24 10:02:52 joe-htpc kernel: [ 11.767299] ip6_tables: (C) 2000-2006 Netfilter Core Team
Mar 24 10:21:14 joe-htpc kernel: [ 1113.027561] perf: interrupt took too long (2552 > 2500), lowering kernel.perf_event_max_sample_rate to 78250
Mar 24 10:25:53 joe-htpc kernel: [ 1392.126443] perf: interrupt took too long (3192 > 3190), lowering kernel.perf_event_max_sample_rate to 62500
Mar 24 10:33:52 joe-htpc kernel: [ 1870.411661] perf: interrupt took too long (4029 > 3990), lowering kernel.perf_event_max_sample_rate to 49500
Mar 24 10:38:55 joe-htpc kernel: [ 2173.602436] perf: interrupt took too long (5065 > 5036), lowering kernel.perf_event_max_sample_rate to 39250
Mar 24 10:46:31 joe-htpc kernel: [ 2630.112344] perf: interrupt took too long (6344 > 6331), lowering kernel.perf_event_max_sample_rate to 31500
Mar 24 10:59:12 joe-htpc kernel: [ 3391.098739] perf: interrupt took too long (7940 > 7930), lowering kernel.perf_event_max_sample_rate to 25000
Mar 24 11:09:45 joe-htpc kernel: [ 4023.790507] perf: interrupt took too long (9994 > 9925), lowering kernel.perf_event_max_sample_rate to 20000
Mar 24 14:02:49 joe-htpc kernel: [14407.490847] [drm:drm_scdc_set_high_tmds_clock_ratio [drm_kms_helper]] *ERROR* Failed to read tmds config, err=-6
Mar 24 14:02:49 joe-htpc kernel: [14407.490932] [drm:intel_hdmi_handle_sink_scrambling [i915]] *ERROR* Set TMDS ratio failed
Mar 24 14:02:49 joe-htpc kernel: [14407.654313] show_signal_msg: 22 callbacks suppressed
Mar 24 14:02:49 joe-htpc kernel: [14407.654320] gnome-shell[1132]: segfault at 400000006 ip 0000000400000006 sp 00007ffdb6d27808 error 14
Mar 24 14:02:49 joe-htpc kernel: [14407.802982] [drm:drm_scdc_set_high_tmds_clock_ratio [drm_kms_helper]] *ERROR* Failed to read tmds config, err=-6
Mar 24 14:02:49 joe-htpc kernel: [14407.803023] [drm:intel_hdmi_handle_sink_scrambling [i915]] *ERROR* Set TMDS ratio failed
Mar 24 14:02:49 joe-htpc kernel: [14407.811422] rfkill: input handler enabled
Mar 24 14:02:49 joe-htpc kernel: [14407.864965] [drm:drm_scdc_set_high_tmds_clock_ratio [drm_kms_helper]] *ERROR* Failed to read tmds config, err=-6
Mar 24 14:02:49 joe-htpc kernel: [14407.865001] [drm:intel_hdmi_handle_sink_scrambling [i915]] *ERROR* Set TMDS ratio failed
Mar 24 14:03:02 joe-htpc kernel: [14420.978276] rfkill: input handler disabled
Mar 24 14:05:00 joe-htpc kernel: [14539.141142] [drm:drm_scdc_set_high_tmds_clock_ratio [drm_kms_helper]] *ERROR* Failed to read tmds config, err=-6
Mar 24 14:05:00 joe-htpc kernel: [14539.141227] [drm:intel_hdmi_handle_sink_scrambling [i915]] *ERROR* Set TMDS ratio failed
Mar 24 14:05:01 joe-htpc kernel: [14539.308356] gnome-shell[2994]: segfault at 18 ip 00007f90ebe9f2d4 sp 00007ffc7dd17978 error 4 in libmutter-1.so.0.0.0[7f90ebe00000+142000]
Mar 24 14:05:01 joe-htpc kernel: [14539.804744] rfkill: input handler enabled
Mar 24 14:05:13 joe-htpc kernel: [14551.557178] rfkill: input handler disabled
Mar 24 14:06:11 joe-htpc kernel: [14609.583412] [drm:drm_scdc_set_high_tmds_clock_ratio [drm_kms_helper]] *ERROR* Failed to read tmds config, err=-6
Mar 24 14:06:11 joe-htpc kernel: [14609.583505] [drm:intel_hdmi_handle_sink_scrambling [i915]] *ERROR* Set TMDS ratio failed
Mar 24 14:06:11 joe-htpc kernel: [14609.669634] gnome-shell[4295]: segfault at 18 ip 00007f03a4c082d4 sp 00007ffe2eccdae8 error 4 in libmutter-1.so.0.0.0[7f03a4b69000+142000]
Mar 24 14:06:11 joe-htpc kernel: [14609.780453] rfkill: input handler enabled
Mar 24 14:06:24 joe-htpc kernel: [14623.069762] rfkill: input handler disabled
我大约在 11 点离开 htpc，大约在下午 2 点回来。我在 14:05 左右再次重现了同样的问题。
我看到了那里几个错误但我仍然需要帮助来找出主要问题是什么。
我认为当我重新打开屏幕时会发生一些事情，因为当我让它继续进行视频编码时，工作最终会完成...只有当我重新打开屏幕时它才会停止工作。我在网上搜索并询问了不同的人，但没有人能找到解决方案。
我很想解决这个问题，非常感谢您的帮助！提前致谢