电脑死机了，然后我按住+ Alt，一一按PrtSc，，，，，，，，但是没有关机。于是我等了一段时间，然后再次按住+并按,,,,,, 。REISUBAltPrtScREISUB
然后它变成了黑屏，左上角有一条细小的白线。然后我又++了几次Alt，也没有明显的反应。我按住电源按钮并将其关闭。PrtScREISUB
这些是我关闭计算机之前的最后几行日志：
11:17:53 kernel: sysrq: Keyboard mode set to system default
11:17:53 kernel: sysrq: Keyboard mode set to system default
11:15:38 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:15:35 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:15:31 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:15:26 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:15:20 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:15:15 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:15:00 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:14:57 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:14:56 kernel: sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(v) show-blocked-tasks(w) dump-ftrace-buffer(z)
11:12:05 kernel: ---[ end trace a43d1a9c4ed7a4a1 ]---
11:12:05 kernel: Modules linked in: nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi intel_rapl_msr snd_hda_codec snd_hda_core snd_hwdep snd_pcm mei_hdcp intel_rapl_common intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_seq_midi snd_seq_midi_event crct10dif_pclmul snd_rawmidi ghash_clmulni_intel aesni_intel crypto_simd cryptd rapl intel_cstate snd_seq snd_seq_device snd_timer i915 gigabyte_wmi wmi_bmof snd efi_pstore drm_kms_helper cec rc_core ee1004 i2c_algo_bit fb_sys_fops syscopyarea joydev input_leds soundcore mei_me sysfillrect sysimgblt mei mac_hid acpi_pad acpi_tad sch_fq_codel msr parport_pc ppdev drm lp parport ip_tables x_tables autofs4 hid_generic usbhid hid crc32_pclmul e1000e i2c_i801 nvme i2c_smbus nvme_core ahci xhci_pci libahci xhci_pci_renesas wmi video
11:12:05 kernel: </TASK>
11:12:05 kernel: R13: 00007ffd70516ca8 R14: 00007f606a9e6018 R15: 00007ffd70516bb8
11:12:05 kernel: R10: 00007ffd7051d090 R11: 0000000000000293 R12: 0000000000000000
11:12:05 kernel: RBP: 00007ffd70516ca4 R08: 0000000000000000 R09: 0000000000000000
尽管日志显示“键盘模式设置为系统默认值”，但即使我等待了几分钟，计算机也没有关闭。如何让 REISUB 发挥作用？
操作系统是 Ubuntu 20.04.3 LTS。
编辑：这些是冻结发生时系统日志的条目。
11:12:01 kernel: RAX: feff8d06657e1cc0 RBX: ffffe01c08836000 RCX: 0000000000000007
11:12:01 kernel: RSP: 0018:ffffaf8f8127bac0 EFLAGS: 00010202
11:12:01 kernel: Code: 3d 3d 01 48 29 c8 41 8b 48 20 89 c6 48 0f af f1 41 0f b6 48 24 48 c1 ee 20 29 f0 d3 e8 41 0f b6 48 25 01 f0 d3 e8 48 8d 04 c2 <4c> 8b 20 4d 85 e4 0f 84 af 00 00 00 48 c7 00 00 00 00 00 41 8b 70
11:12:01 kernel: RIP: 0010:memcg_slab_free_hook+0x70/0x230
11:12:01 kernel: Hardware name: Gigabyte Technology Co., Ltd. B365 M AORUS ELITE/B365 M AORUS ELITE-CF, BIOS F2 08/13/2019
11:12:01 kernel: CPU: 0 PID: 1949 Comm: Socket Thread Not tainted 5.13.0-37-generic #42~20.04.1-Ubuntu
11:12:01 kernel: general protection fault, probably for non-canonical address 0xfeff8d06657e1cc0: 0000 [#1] SMP PTI
Mar 26 10:45:19 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 10:45:19 gnome-shell[1517]: g_dbus_connection_emit_signal: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 10:45:19 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 11:03:49 dbus-daemon[646]: [system] Activating via systemd: service name='net.reactivated.Fprint' unit='fprintd.service' requested by ':1.81' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:03:49 systemd[1]: Starting Fingerprint Authentication Daemon...
Mar 26 11:03:49 dbus-daemon[646]: [system] Successfully activated service 'net.reactivated.Fprint'
Mar 26 11:03:49 systemd[1]: Started Fingerprint Authentication Daemon.
Mar 26 11:03:59 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 11:03:59 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 11:03:59 NetworkManager[649]: <info> [1648263839.2005] agent-manager: agent[7cccc8467972acfa,:1.81/org.gnome.Shell.NetworkAgent/1000]: agent registered
Mar 26 11:03:59 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating service name='org.freedesktop.FileManager1' requested by ':1.43' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:03:59 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 11:03:59 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 11:03:59 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating service name='org.gnome.Nautilus' requested by ':1.43' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:03:59 gnome-shell[1517]: cr_parser_new_from_buf: assertion 'a_buf && a_len' failed
Mar 26 11:03:59 gnome-shell[1517]: cr_declaration_parse_list_from_buf: assertion 'parser' failed
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 31 with keysym 31 (keycode a).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 32 with keysym 32 (keycode b).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 38 with keysym 38 (keycode 11).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 39 with keysym 39 (keycode 12).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 33 with keysym 33 (keycode c).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 34 with keysym 34 (keycode d).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 35 with keysym 35 (keycode e).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 36 with keysym 36 (keycode f).
Mar 26 11:03:59 gnome-shell[1517]: Window manager warning: Overwriting existing binding of keysym 37 with keysym 37 (keycode 10).
Mar 26 11:04:19 systemd[1]: fprintd.service: Succeeded.
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating service name='org.gnome.ControlCenter.SearchProvider' requested by ':1.43' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating service name='org.gnome.Nautilus' requested by ':1.43' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating service name='org.gnome.Calculator.SearchProvider' requested by ':1.43' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311]
Activating service name='org.gnome.Calendar' requested by ':1.43' (uid=1000 pid=1517 com
m="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311]
Activating service name='org.gnome.Characters.BackgroundService' requested by ':1.43' (u
id=1000 pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311]
Activating service name='org.gnome.seahorse.Application' requested by ':1.43' (uid=1000
pid=1517 comm="/usr/bin/gnome-shell " label="unconfined")
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311]
Activating via systemd: service name='org.gnome.Terminal' unit='gnome-terminal-server.se
rvice' requested by ':1.43' (uid=1000 pid=1517 comm="/usr/bin/gnome-shell " label="uncon
fined")
Mar 26 11:04:41 systemd[1300]: Created slice apps.slice.
Mar 26 11:04:41 systemd[1300]: Created slice apps-org.gnome.Ter
minal.slice.
Mar 26 11:04:41 systemd[1300]: Starting GNOME Terminal Server..
.
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311]
Successfully activated service 'org.gnome.ControlCenter.SearchProvider'
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311]
Successfully activated service 'org.gnome.seahorse.Application'
Mar 26 11:04:41 dbus-daemon[646]: [system] Activating via syste
md: service name='org.freedesktop.timedate1' unit='dbus-org.freedesktop.timedate1.servic
e' requested by ':1.184' (uid=1000 pid=5785 comm="/usr/bin/gnome-calendar --gapplication
-service " label="unconfined")
Mar 26 11:04:41 systemd[1]: Starting Time & Date Service...
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.gnome.Terminal'
Mar 26 11:04:41 systemd[1300]: Started GNOME Terminal Server.
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.gnome.Characters.BackgroundService'
Mar 26 11:04:41 dbus-daemon[646]: [system] Successfully activated service 'org.freedesktop.timedate1'
Mar 26 11:04:41 systemd[1]: Started Time & Date Service.
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.gnome.Calendar'
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.gnome.Nautilus'
Mar 26 11:04:41 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.gnome.Calculator.SearchProvider'
Mar 26 11:04:43 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating service name='org.gnome.gedit' requested by ':1.119' (uid=1000 pid=5780 comm="/usr/bin/nautilus --gapplication-service " label="unconfined")
Mar 26 11:04:43 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.gnome.gedit'
Mar 26 11:04:48 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating via systemd: service name='org.freedesktop.Tracker1' unit='tracker-store.service' requested by ':1.2' (uid=1000 pid=1308 comm="/usr/libexec/tracker-miner-fs " label="unconfined")
Mar 26 11:04:48 systemd[1300]: Starting Tracker metadata database store and lookup manager...
Mar 26 11:04:48 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.freedesktop.Tracker1'
Mar 26 11:04:48 systemd[1300]: Started Tracker metadata database store and lookup manager.
Mar 26 11:04:48 dbus-daemon[1311]: [session uid=1000 pid=1311] Activating via systemd: service name='org.freedesktop.Tracker1.Miner.Extract' unit='tracker-extract.service' requested by ':1.2' (uid=1000 pid=1308 comm="/usr/libexec/tracker-miner-fs " label="unconfined")
Mar 26 11:04:48 systemd[1300]: Starting Tracker metadata extractor...
Mar 26 11:04:48 tracker-extract[5882]: Set scheduler policy to SCHED_IDLE
Mar 26 11:04:48 tracker-extract[5882]: Setting priority nice level to 19
Mar 26 11:04:48 dbus-daemon[1311]: [session uid=1000 pid=1311] Successfully activated service 'org.freedesktop.Tracker1.Miner.Extract'
Mar 26 11:04:48 systemd[1300]: Started Tracker metadata extractor.
Mar 26 11:04:51 systemd[1300]: gnome-terminal-server.service: Succeeded.
Mar 26 11:04:58 systemd[1300]: tracker-extract.service: Succeeded.
Mar 26 11:05:11 systemd[1]: systemd-timedated.service: Succeeded.
Mar 26 11:05:18 tracker-store[5873]: OK
Mar 26 11:05:18 systemd[1300]: tracker-store.service: Succeeded.
Mar 26 11:05:19 rtkit-daemon[831]: Supervising 6 threads of 5 processes of 1 users.
答案1
某些发行版会阻止某些系统请求命令，因为它们可能（可能）被能够物理访问您键盘的人利用。如果您发出命令sysctl kernel.sysrq如果您在终端中并得到除“1”之外的任何数字答案，那么您的系统就是这种情况。例如，Ubuntu 18.04 返回“176”——这意味着“e”和“i”命令被阻止。如果您想恢复对系统请求命令的完全访问权限，使用 sudo 编辑文件 /etc/sysctl.conf 并取消注释#kernel.sysrq=1 行。 它将在下次启动时生效。
https://tp69.blog/2019/04/23/recovering-from-a-freeze-in-linux/