连接到第二个屏幕时 Ubuntu 18.04.1 冻结

Joh*_*ohn 5 display bug-reporting monitor displayport 18.04

一切正常,直到昨天 :) 我使用mini-DP连接到我的屏幕已经一年多了。现在,当我连接电缆时,它会识别它(所以我在屏幕上看到 Ubuntu 背景并且可以在我的笔记本电脑上工作)但是当我合上盖子或将显示器设置为主屏幕时(以便仅从显示器上工作)屏幕,我一直在做),整个系统冻结。移除电缆没有任何作用。只有硬重启(连续按下电源按钮)才能启动它。

内核:4.15.0-44-generic,上18.04.1 LTS (Bionic)

dmesg由于冻结,我无法从中获得任何信息,但其中的一些错误/var/log/syslog可能会有所帮助:

kernel: [  495.245250] ACPI Error: Method parse/execution failed \_GPE.XTBT, AE_ALREADY_EXISTS (20170831/psparse-550)
...
kernel: [  495.308520] pci 0000:03:00.0: BAR 13: failed to assign [io  size 0x2000]
...
gsd-color[1425]: no xrandr-Dell Inc.-DELL U2417H-5K9YD7AE224L device found: Failed to find output xrandr-Dell Inc.-DELL U2417H-5K9YD7AE224L
...
/usr/lib/gdm3/gdm-x-session[1974]: Errors from xkbcomp are not fatal to the X server
...
systemd-udevd[4191]: Process '/usr/sbin/alsactl -E HOME=/run/alsa restore 1' failed with exit code 99.
...
gnome-shell[1216]: Failed to apply DRM plane transform 0: Permission denied
gnome-shell[1216]: Failed to read EDID from 'eDP-1': No such file or directory
gnome-shell[1216]: message repeated 3 times: [ Failed to read EDID from 'eDP-1': No such file or directory]
gsd-color[1425]: failed to set screen _ICC_PROFILE: Failed to open file â<80><9c>/home/john/.local/share/icc/edid-18e261c7e650a8a483510701873ac4e2.iccâ<80><9d>: Permission denied
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还有其他人有同样的问题吗?如果这是让 Ubuntu 开发人员知道的普遍问题,我该怎么办?

Joh*_*ohn 1

所以,问题出在4.15.0-44-generic内核中,并已在4.15.0-45-generic. 要手动更新,请运行:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
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这就解决了问题。