登录后：[drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done 超时

Question

我正在使用 Ubuntu 18.04，登录后大约 1 分钟，我的笔记本电脑变得非常慢，并且出现很多drm_atomic_helper错误（flip_done超时）。切换到文本控制台时一切似乎都很好。启动过程本身并不慢。

内核 4.15.0-29 和 4.15.0-30 会出现这种情况，但是不适用于 4.15.0.24。

该笔记本电脑是戴尔 XPS 13 (9370)，图形芯片是：

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)

我尝试添加video=SVIDEO-1:d启动参数，但问题仍然一样。

以下是系统日志的一部分。

任何帮助，将不胜感激。

Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:78
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:72
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:66
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:69
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:77
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:71
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:73
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:65
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:76
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 226:0
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:74
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:67
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:68
Aug  8 10:15:57 boson /usr/lib/gdm3/gdm-x-session[2240]: (II) systemd-logind: got pause for 13:75
Aug  8 10:15:57 boson kernel: [   61.523178] rfkill: input handler enabled
Aug  8 10:15:57 boson kernel: [   62.275790] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:15:57 boson kernel: [   72.511181] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:15:57 boson kernel: [   82.748672] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:28:plane 1A] flip_done timed out
Aug  8 10:15:57 boson kernel: [   92.986813] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:15:57 boson kernel: [  103.225879] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:15:57 boson kernel: [  113.465111] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:28:plane 1A] flip_done timed out
Aug  8 10:15:57 boson kernel: [  123.704451] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:15:57 boson kernel: [  133.943846] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:15:57 boson kernel: [  144.183754] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:28:plane 1A] flip_done timed out
Aug  8 10:15:57 boson kernel: [  154.427568] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:16:27 boson kernel: [  164.663485] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:16:27 boson kernel: [  174.903069] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:28:plane 1A] flip_done timed out
Aug  8 10:16:27 boson kernel: [  185.142853] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:37:pipe A] flip_done timed out
Aug  8 10:16:51 boson kernel: [  209.218455] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
Aug  8 10:17:00 boson systemd[1]: Started Session 6 of user hans.
Aug  8 10:17:01 boson CRON[5720]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Aug  8 10:18:01 boson CRON[6484]: (hans) CMD (offlineimap >/dev/null 2>&1)