我正在连接 HDMI 电缆。它本来可以工作，但由于某种原因停止工作了，这是我到目前为止所做的吗？
- 重启电脑，重新连接；
- 进入配置并检查显示是否出现，如果不存在则不显示；
- 重新启动监视器。
- 尝试使用另一根电缆连接另一台显示器，结果出现了同样的情况。
- 尝试了同一台笔记本电脑上的其他操作系统，出现了同样的情况。
- 用另一台笔记本电脑检查了同一张桌子和显示器，它起作用了。
我的配置：
- Ubuntu 18.04.3 LTS
- 显卡 英特尔® 高清显卡 620 (Kaby Lake GT2)
内核信息：
Linux insp-7560 4.15.0-55-generic #60-Ubuntu SMP 2019 年 7 月 2 日星期二 18:22:20 UTC x86_64 x86_64 x86_64 GNU/Linux
输出中存在一些错误dmesg：
[ 270.143265] usb 1-1: USB disconnect, device number 2
[ 274.629530] usb 1-3: USB disconnect, device number 3
[ 452.691211] pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4
[ 452.691221] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID)
[ 452.691228] pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000
[ 452.691232] pcieport 0000:00:1c.4: [12] Replay Timer Timeout
[ 641.941847] pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4
[ 641.941865] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID)
[ 641.941875] pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000
[ 641.941883] pcieport 0000:00:1c.4: [12] Replay Timer Timeout
[ 696.176349] pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4
[ 696.176367] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID)
[ 696.176378] pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000
[ 696.176386] pcieport 0000:00:1c.4: [12] Replay Timer Timeout
[ 700.334881] rfkill: input handler enabled
[ 716.100019] rfkill: input handler disabled
[ 1104.383811] pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4
[ 1104.383822] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID)
[ 1104.383828] pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000
[ 1104.383832] pcieport 0000:00:1c.4: [12] Replay Timer Timeout
[ 1126.232837] pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4
[ 1126.232861] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID)
[ 1126.232884] pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000
[ 1126.232896] pcieport 0000:00:1c.4: [12] Replay Timer Timeout
[ 1501.322758] dell_wmi: Unknown WMI event type 0x12
的输出xrandr为：
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1920x1080 60.03*+ 60.01 59.97 59.96 59.93 48.00
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 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
答案1
正如评论中提到的。
错误输出显示：
[ 452.691211] pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4
[ 452.691221] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID)
[ 452.691228] pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000
[ 452.691232] pcieport 0000:00:1c.4: [12] Replay Timer Timeout
您可能遇到了有关 PCIe Lower State 的问题。您需要在 GRUB 中禁用此功能。
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=noaer"
保存了您的/etc/default/grub并sudo update-grub最终重新启动您的系统。
希望这可以帮助。