通常,我通过 HDMI 将笔记本电脑连接到 4k 显示器。几个月前,我通过 HDMI 将笔记本电脑连接到电视。断开连接后,我无法再在显示器上使用 4k。我可能在断开电视连接之前让电脑进入睡眠状态,但我不能确定。我在互联网上搜索过,包括 Stack Exchange,但没有找到解决方案。
当我连接显示器时,我可以选择使用 4k,但如果选择它,则不会向显示器发送信号。看来X真的看到了新的决议;我可以将鼠标向显示器的方向移开,但需要一些时间才能将其移回原处。所以 X 在那里看到了一些桌面空间。
该笔记本电脑是 Dell Precision 5530,配有 NVidia Quadro P1000。我正在运行 Kubuntu 19.10 和 NVidia 440.100 驱动程序。显示器是 LG 27UD69P。电视是三星智能电视,但我手边没有型号信息。
这是我的 xrandr 输出。 eDP-1-1 是笔记本电脑的内置显示屏。 DP-1-3 是 HDMI 接口。
$ xrandr
Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
eDP-1-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
3840x2160 60.00 + 59.98 59.97
3200x1800 59.96 59.94
2880x1620 59.96 59.97
2560x1600 59.99 59.97
2560x1440 59.99 59.99 59.96 59.95
2048x1536 60.00
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
2048x1152 59.99 59.98 59.90 59.91
1920x1200 59.88 59.95
1920x1080 60.01* 59.97 59.96 59.93
1600x1200 60.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1-1 disconnected (normal left inverted right x axis y axis)
DP-1-2 disconnected (normal left inverted right x axis y axis)
DP-1-3 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 600mm x 340mm
3840x2160 30.00 + 25.00 24.00 29.97 23.98
2560x1440 59.95
1920x1080 60.00* 59.94 30.00 29.97
1920x1080i 60.00 59.94
1600x900 60.00
1280x1024 60.02
1280x800 59.91
1152x864 59.97
1280x720 60.00 59.94
1024x768 60.00
800x600 60.32
720x480 60.00 59.94
640x480 60.00 59.94