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Comment by rootusrootus | Hacker News Reader

Yes. This is actually a known issue, provided you have an external monitor attached; lots of people complaining about it. The Mac actually wakes up instantly if you lift the screen, but it usually takes 5-10 seconds before it will wake up the external monitor.

Worse, for some of us when it does finally wake up the monitor, sometimes it wakes it up with all the wrong colors, and rebooting is the only reliable fix. (and before anyone asks, yes, I tried a different HDMI cable)

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For me it's maybe 5-10 seconds for it to wake my Thunderbolt monitor (LG 4K) from "cold".

It's much faster if the monitor has been used recently, though, so I always figured it was the monitor that was causing the delay by going into some deep sleep state?

It seems a little faster, but not dramatically so for me, when I'm hot switching between different inputs on the monitor. Definitely I think some of it is just the monitor not being really fast about switching, but I use the same monitor with a brand new 16 inch MBP and it's much faster at triggering the monitor to wake up.

Same monitor. The workaround is to put the monitor on a power strip you can trigger when you walk up to it. Hard power off/on of this monitor and it instantly displays for me now.

Found the same

I don't know why I got downvoted on that, it's strange advice but it really works

Do you have issues with the sound on your LG monitor? I have an LG too and the sound being transmitted by the M1 is very bad.

The sound quality is indeed pretty bad on the LG 4K. Noticeably worse than the MacBook Air's built in speakers.

It's just "cheap speakers" bad, though, not anything that would suggest an issue with the sound output from the M1. I've used the LG with a few different Macs, and sound quality is the same from any of them.

I think they are still working through some external monitor driver issues. The colors on my LG 4k were initially way off until I did an advanced calibration. Occasionally waking up from sleep it will revert, but opening the Display preference and swapping between the calibrations fixes it. My connection is through usbc.

I don't have any performance issues waking up though.

I think there are a couple issues going on with the colors. For some people it is calibration. But what I experience is almost like a color inversion (but it's not a full inversion, it looks like maybe one or two channels got inverted). Makes it difficult to even find the mouse pointer so I can get to the menu and reboot the machine. Then it comes up fine.

Interesting. I did submit a bug to Apple about my issue. Mainly because I never did a calibration with my 2017 mbp and the monitor looked great. With the M1 MBA I had to do the advanced calibration just to make the same monitor usable. Otherwise the colors were completely washed out. It almost seemed like the setting to auto-dim the laptop monitor was also being oddly applied to the external.

This happens to me too! Exactly as described. I have 16gbac mini conmected to an external monitor with an HDMI cable. A bit irritating but not a huge deal I don't do any color work on it so the occassional color issues are not a problem for me.

I've got an Intel Mini, and it's much faster to wake when I'm using a TB3->HDMI cable than an HDMI->HDMI cable. (Going to a dell 3219Q)

Anecdotal, but I haven’t seen any issues while using DisplayPort rather than HDMI. EDIT: Other than the delay in waking the monitor.

Yeah, I would like to use DP, for sure. A peculiarity of my situation and the devices I need to connect means I can't make that work with just two ports on the laptop. So I use the Apple USB-C PD/HDMI/USB adapter so I can get the ports I need and still charge.

Does this happen with the Mac Mini?

M1 instantly wakes my XDR display and never has a problem.

>and before anyone asks, yes, I tried a different HDMI cable

Have you tried a USB-C/thunderbolt cable/controller tho?

I'm kinda limited in my options, because this MBP only has two USB ports. So I have one port which goes to a USB hub, and the other port goes to an Apple A/V adapter with USB-C power delivery pass-thru, HDMI, and a USB port. If not for my need to have one USB port be switchable, and the rest not, I'd use a USB-C -> DP cable like I use on my 16" MBP.

This may prompt me to upgrade prematurely, if/when the next M1 MBP comes out with more than two ports.

Get a thunderbolt dock and you don’t have to worry about it. The dock also charges my MBA.

Which dock are you using? Caldigit? Those seem popular, but I see there are a number of options at every price point.

I have the OWC TB dock that was just released (and has been backordered). It works great other than the headphone jack has a slight hiss that I don't get plugging directly into the MBA.

CalDigit TS3+ works great for me with monitor hooked up on DisplayPort. No delay on resume. This is the dock Apple sells.

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