几天前，我突然遇到一个奇怪的问题，似乎只是偶尔发生。如果我在浏览器（Chrome 或 Firefox）上流式传输视频或进行音频通话，我的系统有时会完全冻结，音频的最后半秒左右会循环播放。我必须长按电源按钮才能强制关机。上次发生这种情况时，我发现紧接着以下情况的系统日志条目：
May 12 15:15:22 Machine gnome-shell[12407]: [19904:20:0512/151522.107395:ERROR:webrtc_video_engine.cc(3350)] Absent receive stream; ignoring clearing encoded frame sink for ssrc 0
May 12 15:15:44 Machine gnome-shell[12407]: [19904:20:0512/151544.534097:ERROR:webrtc_video_engine.cc(3350)] Absent receive stream; ignoring clearing encoded frame sink for ssrc 0
May 12 15:16:08 Machine gnome-shell[2103]: ../clutter/clutter/clutter-actor.c:10558: The clutter_actor_set_allocation() function can only be called from within the implementation of the ClutterActor::allocate() virtual function.
May 12 15:16:29 Machine gnome-shell[2103]: ../clutter/clutter/clutter-actor.c:10558: The clutter_actor_set_allocation() function can only be called from within the implementation of the ClutterActor::allocate() virtual function.
May 12 15:17:01 Machine CRON[20644]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
May 12 15:17:34 Machine gnome-shell[12407]: [19904:20:0512/151734.483733:ERROR:webrtc_video_engine.cc(3350)] Absent receive stream; ignoring clearing encoded frame sink for ssrc 0
May 12 15:19:21 Machine gnome-shell[12407]: [19904:20:0512/151921.527291:ERROR:webrtc_video_engine.cc(3350)] Absent receive stream; ignoring clearing encoded frame sink for ssrc 0
May 12 15:20:08 Machine gnome-shell[12407]: [19904:20:0512/152008.433602:ERROR:webrtc_video_engine.cc(3350)] Absent receive stream; ignoring clearing encoded frame sink for ssrc 0
May 12 15:20:55 Machine gnome-shell[2103]: ../clutter/clutter/clutter-actor.c:10558: The clutter_actor_set_allocation() function can only be called from within the implementation of the ClutterActor::allocate() virtual function.
May 12 15:24:32 Machine kernel: [12112.697501] perf: interrupt took too long (3145 > 3126), lowering kernel.perf_event_max_sample_rate to 63500
May 12 15:26:18 Machine gnome-shell[2103]: message repeated 3 times: [ ../clutter/clutter/clutter-actor.c:10558: The clutter_actor_set_allocation() function can only be called from within the implementation of the ClutterActor::allocate() virtual function.]
May 12 15:30:01 Machine CRON[20950]: (root) CMD ([ -x /etc/init.d/anacron ] && if [ ! -d /run/systemd/system ]; then /usr/sbin/invoke-rc.d anacron start >/dev/null; fi)
不确定这是否相关，但我的系统偶尔也会在合上盖子时冻结。我遇到的问题与这个帖子。除了集成的 Intel GPU 之外，我还有一个专用的 AMD Radeon GPU，而且我的 WiFi 也曾经出现过问题。在修复这个问题之前，我面临着巨大的系统日志问题，以确保系统日志文件永远不会变得那么大。但唯一的问题是，由于我的系统完全冻结，我没有机会查看我的 RAM 和 Swap 是否已完全填满。而且给出的解决方案不适用于我。
如果相关的话，我最近遇到了这由于 5.8.0-50 内核升级不当导致的问题，我通过恢复到 5.8.0-43 内核解决了这个问题。
更新：仍然没有解决方案，偶尔的系统冻结仍然发生。我找不到常见情况，因为有时即使没有流式传输也会发生这种情况。Firefox 运行时发生过三次，Chrome 运行时发生过一次。此外，我同时使用 KDE Plasma 和 GNOME，显然 KDE Plasma 上的问题更常见。这可能与我的 WiFi 有关，因为现在发生过两次，在冻结后进行硬重启后，WiFi 无法正常工作。我有双启动，启动到 Windows，然后返回到 Ubuntu，WiFi 问题得以解决。
更新：我决定回到旧内核，一两天内都没问题，但问题并没有消失。这种情况仍然会发生，并且运行视频肯定与此有关，因为除非正在播放视频，否则这种情况很少发生。系统日志中没有任何内容表明存在问题。
更新：在短时间内遇到了多次崩溃。在其中一次崩溃之前不久，WiFi 在会话中停止工作（这次系统自行重启）。以下是日志：
May 28 13:13:04 Machine wpa_supplicant[1103]: wlp8s0: CTRL-EVENT-BEACON-LOSS
May 28 13:13:05 Machine kernel: [ 382.206213] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:05 Machine wpa_supplicant[1103]: wlp8s0: CTRL-EVENT-DISCONNECTED bssid=d8:32:14:ac:c3:51 reason=4 locally_generated=1
May 28 13:13:05 Machine NetworkManager[1080]: <warn> [1622187785.4714] sup-iface[0x5643f88e0120,wlp8s0]: connection disconnected (reason -4)
May 28 13:13:05 Machine kernel: [ 382.386690] ath: phy0: Chip reset failed
May 28 13:13:05 Machine kernel: [ 382.386692] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:05 Machine wpa_supplicant[1103]: wlp8s0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
May 28 13:13:05 Machine NetworkManager[1080]: <info> [1622187785.5013] device (wlp8s0): supplicant interface state: completed -> disconnected
May 28 13:13:05 Machine NetworkManager[1080]: <info> [1622187785.5014] device (p2p-dev-wlp8s0): supplicant management interface state: completed -> disconnected
May 28 13:13:05 Machine kernel: [ 382.499354] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:05 Machine NetworkManager[1080]: <info> [1622187785.7671] device (wlp8s0): supplicant interface state: disconnected -> scanning
May 28 13:13:05 Machine NetworkManager[1080]: <info> [1622187785.7671] device (p2p-dev-wlp8s0): supplicant management interface state: disconnected -> scanning
May 28 13:13:05 Machine kernel: [ 382.682440] ath: phy0: Chip reset failed
May 28 13:13:05 Machine kernel: [ 382.682444] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:05 Machine kernel: [ 382.694287] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:05 Machine kernel: [ 382.875265] ath: phy0: Chip reset failed
May 28 13:13:05 Machine kernel: [ 382.875269] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:05 Machine kernel: [ 382.886876] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:06 Machine kernel: [ 383.067340] ath: phy0: Chip reset failed
May 28 13:13:06 Machine kernel: [ 383.067343] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:06 Machine kernel: [ 383.078891] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:06 Machine kernel: [ 383.259781] ath: phy0: Chip reset failed
May 28 13:13:06 Machine kernel: [ 383.259786] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:06 Machine kernel: [ 383.271428] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:06 Machine kernel: [ 383.452775] ath: phy0: Chip reset failed
May 28 13:13:06 Machine kernel: [ 383.452779] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:06 Machine kernel: [ 383.464488] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:06 Machine gnome-shell[2785]: [2778:2903:0528/131306.670523:ERROR:connection_factory_impl.cc(429 )] Failed to connect to MCS endpoint with error -106
May 28 13:13:06 Machine kernel: [ 383.645343] ath: phy0: Chip reset failed
May 28 13:13:06 Machine kernel: [ 383.645349] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:06 Machine kernel: [ 383.656982] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:06 Machine kernel: [ 383.837653] ath: phy0: Chip reset failed
May 28 13:13:06 Machine kernel: [ 383.837655] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:06 Machine kernel: [ 383.849256] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:07 Machine kernel: [ 384.029730] ath: phy0: Chip reset failed
May 28 13:13:07 Machine kernel: [ 384.029732] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:07 Machine kernel: [ 384.041264] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:07 Machine kernel: [ 384.221517] ath: phy0: Chip reset failed
May 28 13:13:07 Machine kernel: [ 384.221520] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:07 Machine kernel: [ 384.233066] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:07 Machine kernel: [ 384.413455] ath: phy0: Chip reset failed
May 28 13:13:07 Machine kernel: [ 384.413457] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:07 Machine kernel: [ 384.425027] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:07 Machine kernel: [ 384.606230] ath: phy0: Chip reset failed
May 28 13:13:07 Machine kernel: [ 384.606234] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:07 Machine kernel: [ 384.617913] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:07 Machine kernel: [ 384.827768] ath: phy0: Chip reset failed
May 28 13:13:07 Machine kernel: [ 384.827772] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:07 Machine kernel: [ 384.839466] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:08 Machine kernel: [ 385.021760] ath: phy0: Chip reset failed
May 28 13:13:08 Machine kernel: [ 385.021764] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:08 Machine kernel: [ 385.033343] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:08 Machine kernel: [ 385.214743] ath: phy0: Chip reset failed
May 28 13:13:08 Machine kernel: [ 385.214748] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:08 Machine kernel: [ 385.226332] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:08 Machine kernel: [ 385.408193] ath: phy0: Chip reset failed
May 28 13:13:08 Machine kernel: [ 385.408198] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:08 Machine kernel: [ 385.419929] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:08 Machine kernel: [ 385.602564] ath: phy0: Chip reset failed
May 28 13:13:08 Machine kernel: [ 385.602568] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:08 Machine kernel: [ 385.614334] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:08 Machine kernel: [ 385.796999] ath: phy0: Chip reset failed
May 28 13:13:08 Machine kernel: [ 385.797003] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:08 Machine kernel: [ 385.808712] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:09 Machine kernel: [ 385.989881] ath: phy0: Chip reset failed
May 28 13:13:09 Machine kernel: [ 385.989885] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:09 Machine kernel: [ 386.001417] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:09 Machine kernel: [ 386.181595] ath: phy0: Chip reset failed
May 28 13:13:09 Machine kernel: [ 386.181598] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:09 Machine kernel: [ 386.193159] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:09 Machine kernel: [ 386.373430] ath: phy0: Chip reset failed
May 28 13:13:09 Machine kernel: [ 386.373433] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:09 Machine kernel: [ 386.385040] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:09 Machine kernel: [ 386.566223] ath: phy0: Chip reset failed
May 28 13:13:09 Machine kernel: [ 386.566227] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:09 Machine kernel: [ 386.577874] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:09 Machine kernel: [ 386.759163] ath: phy0: Chip reset failed
May 28 13:13:09 Machine kernel: [ 386.759167] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:09 Machine kernel: [ 386.770887] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:10 Machine kernel: [ 386.953264] ath: phy0: Chip reset failed
May 28 13:13:10 Machine kernel: [ 386.953268] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:10 Machine kernel: [ 386.965018] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:10 Machine kernel: [ 387.146871] ath: phy0: Chip reset failed
May 28 13:13:10 Machine kernel: [ 387.146875] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:10 Machine kernel: [ 387.158537] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:10 Machine kernel: [ 387.366195] ath: phy0: Chip reset failed
May 28 13:13:10 Machine kernel: [ 387.366199] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:10 Machine kernel: [ 387.377851] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:10 Machine kernel: [ 387.560208] ath: phy0: Chip reset failed
May 28 13:13:10 Machine kernel: [ 387.560213] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:10 Machine kernel: [ 387.571827] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:10 Machine kernel: [ 387.753678] ath: phy0: Chip reset failed
May 28 13:13:10 Machine kernel: [ 387.753682] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:10 Machine kernel: [ 387.765389] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:11 Machine kernel: [ 387.947248] ath: phy0: Chip reset failed
May 28 13:13:11 Machine kernel: [ 387.947252] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:11 Machine kernel: [ 387.958835] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:11 Machine kernel: [ 388.139488] ath: phy0: Chip reset failed
May 28 13:13:11 Machine kernel: [ 388.139492] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:11 Machine kernel: [ 388.151087] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:11 Machine kernel: [ 388.331842] ath: phy0: Chip reset failed
May 28 13:13:11 Machine kernel: [ 388.331847] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:11 Machine kernel: [ 388.343403] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:11 Machine kernel: [ 388.524071] ath: phy0: Chip reset failed
May 28 13:13:11 Machine kernel: [ 388.524076] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:11 Machine kernel: [ 388.535694] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:11 Machine kernel: [ 388.716655] ath: phy0: Chip reset failed
May 28 13:13:11 Machine kernel: [ 388.716660] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:11 Machine kernel: [ 388.728373] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:11 Machine kernel: [ 388.909853] ath: phy0: Chip reset failed
May 28 13:13:11 Machine kernel: [ 388.909857] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:12 Machine kernel: [ 388.921631] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:12 Machine kernel: [ 389.103311] ath: phy0: Chip reset failed
May 28 13:13:12 Machine kernel: [ 389.103315] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:12 Machine kernel: [ 389.114925] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:12 Machine kernel: [ 389.296130] ath: phy0: Chip reset failed
May 28 13:13:12 Machine kernel: [ 389.296134] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:12 Machine kernel: [ 389.307803] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:12 Machine kernel: [ 389.488445] ath: phy0: Chip reset failed
May 28 13:13:12 Machine kernel: [ 389.488449] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:12 Machine kernel: [ 389.500061] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:12 Machine kernel: [ 389.681076] ath: phy0: Chip reset failed
May 28 13:13:12 Machine kernel: [ 389.681080] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:12 Machine kernel: [ 389.692809] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:12 Machine kernel: [ 389.874830] ath: phy0: Chip reset failed
May 28 13:13:12 Machine kernel: [ 389.874844] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:12 Machine kernel: [ 389.886718] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:13 Machine kernel: [ 390.068907] ath: phy0: Chip reset failed
May 28 13:13:13 Machine kernel: [ 390.068912] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:13 Machine kernel: [ 390.080601] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
May 28 13:13:13 Machine kernel: [ 390.262758] ath: phy0: Chip reset failed
May 28 13:13:13 Machine kernel: [ 390.262762] ath: phy0: Unable to reset channel, reset status -22
May 28 13:13:13 Machine kernel: [ 390.274446] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
我怀疑系统过热与此有关，因为最后一次发生时我刚登录（桌面屏幕甚至还没有加载）。我让笔记本电脑关闭 20 分钟，然后启动它，到目前为止它还没有崩溃。这是崩溃前的另一个日志条目，以防它有助于查明来源。
May 28 13:20:17 Machine gnome-shell[3664]: libva error: /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so init failed
May 28 13:20:18 Machine gnome-shell[3664]: [3704:3704:0528/132018.336942:ERROR:sandbox_linux.cc(374)] InitializeSandbox() called with multiple threads in process gpu-process.
几分钟后，出现了以下画面：
May 28 13:27:04 Machine systemd[1]: Starting Manage, Install and Generate Color Profiles...
May 28 13:27:04 Machine gnome-session-binary[1482]: Entering running state
May 28 13:27:04 Machine gsd-media-keys[1852]: Failed to grab accelerator for keybinding settingslayback-repeat
May 28 13:27:04 Machine gsd-media-keys[1852]: Failed to grab accelerator for keybinding settings:rfkill
May 28 13:27:04 Machine gsd-media-keys[1852]: Failed to grab accelerator for keybinding settings:hibernate
May 28 13:27:04 Machine gsd-media-keys[1852]: Failed to grab accelerator for keybinding settingslayback-random
May 28 13:27:04 Machine dbus-daemon[1100]: [system] Successfully activated service 'org.freedesktop.ColorManager'
May 28 13:27:04 Machine systemd[1]: Started Manage, Install and Generate Color Profiles.
May 28 13:27:04 Machine xbrlapi.desktop[2027]: openConnection: connect: No such file or directory
May 28 13:27:04 Machine xbrlapi.desktop[2027]: cannot connect to braille devices daemon brltty at :0
May 28 13:27:05 Machine org.gnome.Shell.desktop[2034]: The XKEYBOARD keymap compiler (xkbcomp) reports:
May 28 13:27:05 Machine org.gnome.Shell.desktop[2034]: > Warning: Unsupported maximum keycode 569, clipping.
May 28 13:27:05 Machine org.gnome.Shell.desktop[2034]: > X11 cannot support keycodes above 255.
May 28 13:27:05 Machine org.gnome.Shell.desktop[2034]: > Internal error: Could not resolve keysym Invalid
May 28 13:27:05 Machine org.gnome.Shell.desktop[2034]: Errors from xkbcomp are not fatal to the X server
May 28 13:27:07 Machine gnome-shell[1542]: Warning: Failed to start gsd-xsettings
May 28 13:27:08 Machine org.gnome.Shell.desktop[1542]: libinput error: client bug: timer event5 keyboard: scheduled expiry is in the past (-74ms), your system is too slow
May 28 13:27:08 Machine gnome-shell[1542]: JS WARNING: [resource:///org/gnome/shell/ui/layout.js 24]: reference to undefined property "MetaWindowXwayland"
更新：尽管重新安装了 Ubuntu 20.04（内核升级到 5.8.0-53），但此问题仍然存在。昨天重新安装后，今天打开笔记本电脑盖并打开 Chrome 上的几个选项卡（浏览器已经打开）后，系统首次冻结。我不知道到底发生了什么，为什么似乎没有人能帮助解决这个问题。
更新：不久前，我关上了笔记本电脑盖（如果发生这种情况，我的系统没有设置为挂起）。我打开它，发现它正在自行重启。我发现了当时的以下日志条目：
Jun 2 18:15:49 Machine thermald[849]: sensor id 4 : No temp sysfs for reading raw tempJun 2 18:23:11 Machine kernel: [ 51.336014] Freezing user space processes ... (elapsed 0.110 seconds) done.
Jun 2 18:23:11 Machine kernel: [ 51.446664] OOM killer disabled.
Jun 2 18:23:11 Machine kernel: [ 51.446667] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Jun 2 18:23:11 Machine kernel: [ 51.448174] printk: Suspending console(s) (use no_console_suspend to debug)
Jun 2 18:23:11 Machine kernel: [ 51.599021] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jun 2 18:23:11 Machine kernel: [ 51.685897] sd 0:0:0:0: [sda] Stopping disk
Jun 2 18:23:11 Machine kernel: [ 51.930059] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
Jun 2 18:23:11 Machine kernel: [ 51.959324] [drm] PCIE GART of 2048M enabled (table at 0x00000000001D6000).
另一组条目如下：
Jun 2 18:23:13 Machine thermald[849]: I/O warning : failed to load external entity "/etc/thermald/thermal-conf.xml"
Jun 2 18:23:13 Machine thermald[849]: error: could not parse file /etc/thermald/thermal-conf.xml
Jun 2 18:23:13 Machine thermald[849]: I/O warning : failed to load external entity "/etc/thermald/thermal-conf.xml"
Jun 2 18:23:13 Machine thermald[849]: error: could not parse file /etc/thermald/thermal-conf.xml
Jun 2 18:23:13 Machine thermald[849]: I/O warning : failed to load external entity "/etc/thermald/thermal-conf.xml"
Jun 2 18:23:13 Machine thermald[849]: error: could not parse file /etc/thermald/thermal-conf.xml
我查过这个 thermald 错误，但还没能找到任何可以实施的明确解决方案。
有没有可能是因为同时安装了 Gnome 和 KDE Plasma 才导致这种情况的？尤其是因为我已将 gdm3 而不是 sddm 设置为显示管理器？
更新：这个问题仍然没有解决办法，而且问题还没有消失。我注意到几次，当我打开大约 5-6 个 Chrome 标签页（我以前也这样），其中可能包含较重的网站时，我的内存占用率超过 90%，系统变得不稳定。但仍然不能确定这是否是根本原因（为什么系统日志没有提到这一点？）。我也不明白为什么我的 Windows 安装在 4 GB 内存下没问题，而 Ubuntu 却不行。这是最近一次崩溃后的另一个日志条目：
Jul 4 14:25:48 Machine google-chrome.desktop[26653]: libva error: /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so init failed
Jul 4 14:25:48 Machine google-chrome.desktop[26653]: [26685:26685:0704/142548.700456:ERROR:sandbox_linux.cc(374)] InitializeSandbox() called with multiple threads in process gpu-process.
Jul 4 14:25:53 Machine google-chrome.desktop[26653]: [26646:26666:0704/142553.812893:ERROR:gcm_store_impl.cc(652)] LevelDB remove failed: NotFound:
Jul 4 14:25:53 Machine google-chrome.desktop[26653]: [26646:26669:0704/142553.813045:ERROR:mcs_client.cc(526)] GCM Update failed!
Jul 4 14:27:18 Machine PackageKit: daemon quit
Jul 4 14:27:18 Machine systemd[1]: packagekit.service: Succeeded.
Jul 4 14:27:56 Machine google-chrome.desktop[26653]: [26687:26690:0704/142756.708204:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:27:56 Machine google-chrome.desktop[26653]: [26687:26690:0704/142756.796603:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:27:56 Machine google-chrome.desktop[26653]: [26687:26690:0704/142756.852918:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:03 Machine google-chrome.desktop[26653]: [26687:26690:0704/142803.997212:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:04 Machine google-chrome.desktop[26653]: [26687:26690:0704/142804.080933:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:04 Machine google-chrome.desktop[26653]: [26687:26690:0704/142804.141079:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:14 Machine google-chrome.desktop[26653]: [26687:26690:0704/142814.603884:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:14 Machine google-chrome.desktop[26653]: [26687:26690:0704/142814.668010:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:14 Machine google-chrome.desktop[26653]: [26687:26690:0704/142814.780805:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:14 Machine google-chrome.desktop[26653]: [26687:26690:0704/142814.860787:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:17 Machine google-chrome.desktop[26653]: (transmission-gtk:27230): GLib-CRITICAL **: 14:28:17.210: g_file_test: assertion 'filename != NULL' failed
Jul 4 14:28:17 Machine dbus-daemon[852]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.212' (uid=1000 pid=27230 comm="transmission-gtk magnet:?xt=urn:btih:1EF2D24F1ECFF" label="unconfined")
Jul 4 14:28:17 Machine systemd[1]: Starting Hostname Service...
Jul 4 14:28:18 Machine dbus-daemon[852]: [system] Successfully activated service 'org.freedesktop.hostname1'
Jul 4 14:28:18 Machine systemd[1]: Started Hostname Service.
Jul 4 14:28:21 Machine google-chrome.desktop[26653]: [26687:26690:0704/142821.884753:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:21 Machine google-chrome.desktop[26653]: [26687:26690:0704/142821.964205:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:22 Machine google-chrome.desktop[26653]: [26687:26690:0704/142822.068246:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:22 Machine google-chrome.desktop[26653]: [26687:26690:0704/142822.140346:ERROR:ssl_client_socket_impl.cc(980)] handshake failed; returned -1, SSL error code 1, net_error -100
Jul 4 14:28:32 Machine google-chrome.desktop[26653]: [26685:26685:0704/142832.102447:ERROR:gl_utils.cc(314)] [.RendererMainThread-0x2c11bcb84700] GL_INVALID_FRAMEBUFFER_OPERATION: Draw framebuffer is incomplete
Jul 4 14:28:48 Machine systemd[1]: systemd-hostnamed.service: Succeeded.
老实说，尽管提供了这么多信息，却没有人能回答这个问题，这让我觉得很奇怪。
答案1
如果您正在使用tlp或slimbook-battery，请卸载它们。