分享一个 MacOS 接绿联 CM818 USB 转 DP 转接器使用感受
M4 处理器 + MacOS 15.7 + DELL 老显示器
- 年初 1 月份购入，刚开始的时候：外壳比体温高，从 sleep 或者单纯熄屏 唤醒显示器慢 可能要 10 秒左右才能唤醒。
- 使用了几周：外壳没有之前热了，偶尔出现 重新开关显示器才能唤醒的情况。
- 使用了 1-2 个月：外壳温度偶尔热偶尔不热，显示器唤醒更难了，需要反复多次插拔线(dp 线和 usb 口都得重新插拔) 同时配合重新开关显示器电源，才能唤醒，而且不保证一次成功。
- 使用了 3 个月：忍无可忍，申请了保修换新，目前使用了几周，发热正常，但是每次主机从熄屏唤醒（单纯熄屏 不 sleep ），都要重新开关显示器电源，否则哪怕等 1 分钟自己也不能自动唤醒。。
这期间转接器一直插电脑 TypeC 口，无论外接屏幕开关，无论主机 Sleep 与否，一直用 MagSafe 口充电 没用到他的充电口。
无法唤醒表现为：主机已经正确识别外接显示器型号、分辨率，Mirror 模式下内屏分辨率已经同步调整了。但是显示器端还提示"No Signal from DP"，即使点了 detect 重新刷新也识别不到信号。
无法唤醒同样发生于通过 TypeC 口连接 iPad ，每次 iPad 熄屏重连时，都需要重新开关显示器才能正常显示。
搜了下现有产品，似乎只找到了绿联做 USB 转 DP 还带 USB3 的 A+C 接口比较友好，看了一些 Thunderbolt 的扩展坞 要外接电源 待机功耗也不低，有什么好产品大家也推荐推荐。。。
接 Apple TypeC 转 HDMI 转接器正常，问了 AI 也没结论，以下为截取日志结尾部分。
Mac 接绿联 CM818 连接 DELL 显示器
% log show --last 1m | grep -i display
...<skip repetition>...
2026-04-16 13:28:55.842059+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::update_power_state display_id=1 current_power_state=0 target_power_state=1 new_target_power_state=1 sync=0 raw_power_state=1 power_assertions=0
2026-04-16 13:28:55.842060+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::set_enabled_ display_id=1, current_state=on
2026-04-16 13:28:55.842772+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:Brightness] Display 1 swap brightness: nan, limit: 337.678, indicator brightness: nan, ambient lux: nan, low ambient strength: nan, high ambient strength: nan, contrast enhancer: nan
2026-04-16 13:28:55.854205+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:Brightness] Display 1 commitBrightness sdr: 2.05082, headroom: 1, potential headroom: 2, ambient lux: 24.0882, filtered ambient: 24.0882, brightness limit: 337.328, indicator brightness: -1 low ambient strength: -1, high ambient strength: -1, contrast enhancer: -1 brightness ctl disabled -1, unlogged brightness transactions:0
2026-04-16 13:28:55.858156+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::update_power_state display_id=1 current_power_state=0 target_power_state=1 new_target_power_state=1 sync=0 raw_power_state=1 power_assertions=0
2026-04-16 13:28:55.858157+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::set_enabled_ display_id=1, current_state=on
2026-04-16 13:28:55.858763+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:Brightness] Display 1 swap brightness: nan, limit: 337.328, indicator brightness: nan, ambient lux: nan, low ambient strength: nan, high ambient strength: nan, contrast enhancer: nan
2026-04-16 13:28:55.870854+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:Brightness] Display 1 commitBrightness sdr: 2.05082, headroom: 1, potential headroom: 2, ambient lux: 24.0882, filtered ambient: 24.0882, brightness limit: 336.979, indicator brightness: -1 low ambient strength: -1, high ambient strength: -1, contrast enhancer: -1 brightness ctl disabled -1, unlogged brightness transactions:0
2026-04-16 13:28:55.879622+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::update_power_state display_id=1 current_power_state=0 target_power_state=1 new_target_power_state=1 sync=0 raw_power_state=1 power_assertions=0
2026-04-16 13:28:55.879624+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::set_enabled_ display_id=1, current_state=on
2026-04-16 13:28:55.880341+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:Brightness] Display 1 swap brightness: nan, limit: 336.979, indicator brightness: nan, ambient lux: nan, low ambient strength: nan, high ambient strength: nan, contrast enhancer: nan
2026-04-16 13:28:55.887535+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:Brightness] Display 1 commitBrightness sdr: 2.05082, headroom: 1, potential headroom: 2, ambient lux: 24.0882, filtered ambient: 24.0882, brightness limit: 336.629, indicator brightness: -1 low ambient strength: -1, high ambient strength: -1, contrast enhancer: -1 brightness ctl disabled -1, unlogged brightness transactions:0
2026-04-16 13:28:55.895837+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::update_power_state display_id=1 current_power_state=0 target_power_state=1 new_target_power_state=1 sync=0 raw_power_state=1 power_assertions=0
2026-04-16 13:28:55.895839+0800 0xdb9 Default 0x0 379 0 WindowServer: (QuartzCore) [com.apple.coreanimation:DisplayState] IOMFBDisplay::set_enabled_ display_id=1, current_state=on
（ log 有些密集 不知道是否正常）
Mac 接 apple TypeC-to-HDMI 连接某 LG 显示器
% log show --last 1m | grep -i display
...<skip repetition>...
2026-04-16 12:54:45.056043+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:45.723089+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:45.942056+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.133062+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.233027+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.337951+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.443936+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.563796+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.788039+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:46.927973+0800 0xde020 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:47.181995+0800 0xde1f2 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:47.269834+0800 0xde1f2 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:47.365845+0800 0xde1f2 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:47.498018+0800 0xde1f2 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:47.877299+0800 0xde1f2 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
2026-04-16 12:54:47.977957+0800 0xde1f2 Default 0x0 322 8 powerd: [com.apple.powerd:displayState] DesktopMode check on Battery 0
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