在 Dell Inspiron 3584 [Ubuntu 20.04] 上打开和关闭 HDMI

Question

我在使用电视和 Dell Inspiron 3584 笔记本电脑的“连接显示”模式时遇到了一些问题。一段时间后，电视图像消失，几分钟后又恢复。我做了一些操作tail -f /var/log来查看发生这种情况时日志中显示的内容，我看到了以下消息：

当电视图像消失时：

Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): EDID vendor "AUO", prod id 29164
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Printing DDC gathered Modelines:
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   76.30  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (49.0 kHz eP)
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   61.04  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (39.2 kHz e)
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): EDID vendor "AUO", prod id 29164
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Printing DDC gathered Modelines:
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   76.30  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (49.0 kHz eP)
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   61.04  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (39.2 kHz e)
Jun  5 09:26:38 Inspiron-3584 rtkit-daemon[968]: Supervising 3 threads of 1 processes of 1 users.
Jun  5 09:26:38 Inspiron-3584 rtkit-daemon[968]: Successfully made thread 7231 of process 1873 owned by '1000' RT at priority 5.
Jun  5 09:26:38 Inspiron-3584 rtkit-daemon[968]: Supervising 4 threads of 1 processes of 1 users.
Jun  5 09:26:38 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Allocate new frame buffer 1366x768 stride
Jun  5 09:26:38 Inspiron-3584 rtkit-daemon[968]: Supervising 3 threads of 1 processes of 1 users.
Jun  5 09:26:38 Inspiron-3584 rtkit-daemon[968]: Successfully made thread 7232 of process 1873 owned by '1000' RT at priority 5.
Jun  5 09:26:38 Inspiron-3584 rtkit-daemon[968]: Supervising 4 threads of 1 processes of 1 users.
Jun  5 09:26:38 Inspiron-3584 gsd-media-keys[2279]: Unable to get default sink
Jun  5 09:26:39 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): EDID vendor "AUO", prod id 29164
Jun  5 09:26:39 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Printing DDC gathered Modelines:
Jun  5 09:26:39 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   76.30  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (49.0 kHz eP)
Jun  5 09:26:39 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   61.04  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (39.2 kHz e) 

当图像恢复时：

Jun  5 09:31:06 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): EDID vendor "AUO", prod id 29164
Jun  5 09:31:06 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Printing DDC gathered Modelines:
Jun  5 09:31:06 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   76.30  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (49.0 kHz eP)
Jun  5 09:31:06 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   61.04  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (39.2 kHz e)
Jun  5 09:31:06 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (--) modeset(0): HDMI max TMDS frequency 225000KHz
Jun  5 09:31:06 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Allocate new frame buffer 3286x1080 stride
Jun  5 09:31:06 Inspiron-3584 rtkit-daemon[968]: Supervising 3 threads of 1 processes of 1 users.
Jun  5 09:31:06 Inspiron-3584 rtkit-daemon[968]: Successfully made thread 7396 of process 1873 owned by '1000' RT at priority 5.
Jun  5 09:31:06 Inspiron-3584 rtkit-daemon[968]: Supervising 4 threads of 1 processes of 1 users.
Jun  5 09:31:06 Inspiron-3584 rtkit-daemon[968]: Supervising 3 threads of 1 processes of 1 users.
Jun  5 09:31:06 Inspiron-3584 rtkit-daemon[968]: Successfully made thread 7397 of process 1873 owned by '1000' RT at priority 5.
Jun  5 09:31:06 Inspiron-3584 rtkit-daemon[968]: Supervising 4 threads of 1 processes of 1 users.
Jun  5 09:31:07 Inspiron-3584 gsd-media-keys[2279]: Unable to get default sink
Jun  5 09:31:07 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): EDID vendor "AUO", prod id 29164
Jun  5 09:31:07 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Printing DDC gathered Modelines:
Jun  5 09:31:07 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   76.30  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (49.0 kHz eP)
Jun  5 09:31:07 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (II) modeset(0): Modeline "1366x768"x0.0   61.04  1366 1374 1384 1558  768 771 772 816 +hsync -vsync (39.2 kHz e)
Jun  5 09:31:07 Inspiron-3584 /usr/lib/gdm3/gdm-x-session[1947]: (--) modeset(0): HDMI max TMDS frequency 225000KHz
Jun  5 09:31:07 Inspiron-3584 colord[1490]: failed to get session [pid 2271]: No data available

1. 操作系统：Ubuntu 20.04。
2. 笔记本电脑：戴尔 Inspiron 3584
3. 电视：飞利浦39pfl4707g/78
4. HDMI 线缆：适用于 PS4 和 Windows。

泰。