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nomeata · 02-27-2021, 03:12 PM

(This is about the Max Lumi, but probably applies to the other Max devices as well.)

I received my eagerly awaited Boox Max Lumi two days ago, and I had high hopes for the HDMI monitor mode. Unfortunately, I am facing troubles.

It can connect to my Linux laptop (a Thinkpad), xrandr shows the 2200×1650 resolution for the HDMI1 device, and I can show my screen there. But it doesn't look right: The fonts are frazzeled, and one-pixel-wide solid black lines turn out to to be dotted. This is in „Fast mode”, the other modes are worse in their own ways.

It looks as if the picture is not transmitted in a lossless way, but rather scaled down and up again somewhere? Or else compressed.

Same when using it from a Windows laptop.

Is there something I could check?

As an alternative, I tried to use VNC (MultiVNC on Android, x11vnc on my laptop). Now the text and lines are as crisp as one would expects from a high-res eInk display. But this way, the latency is just a bit too high, I can type a word or two before I see it. This was via Wifi, but also via USB cable (I didn't get USB networking working, but tried adb reverse). I am not sure why this is delayed; whether it’s the a problem with VNC in general, or this VNC client?

So, right now I can choose between low latency but bad quality (HDMI) or good quality but high latency (VNC). How I achieve both?

02-27-2021, 03:12 PM	#1
nomeata Member Posts: 18 Karma: 10 Join Date: Aug 2014 Device: Kobo Aura HD	Boox Max HDMI mode not crisp (This is about the Max Lumi, but probably applies to the other Max devices as well.) I received my eagerly awaited Boox Max Lumi two days ago, and I had high hopes for the HDMI monitor mode. Unfortunately, I am facing troubles. It can connect to my Linux laptop (a Thinkpad), xrandr shows the 2200×1650 resolution for the HDMI1 device, and I can show my screen there. But it doesn't look right: The fonts are frazzeled, and one-pixel-wide solid black lines turn out to to be dotted. This is in „Fast mode”, the other modes are worse in their own ways. It looks as if the picture is not transmitted in a lossless way, but rather scaled down and up again somewhere? Or else compressed. Same when using it from a Windows laptop. Is there something I could check? As an alternative, I tried to use VNC (MultiVNC on Android, x11vnc on my laptop). Now the text and lines are as crisp as one would expects from a high-res eInk display. But this way, the latency is just a bit too high, I can type a word or two before I see it. This was via Wifi, but also via USB cable (I didn't get USB networking working, but tried adb reverse). I am not sure why this is delayed; whether it’s the a problem with VNC in general, or this VNC client? So, right now I can choose between low latency but bad quality (HDMI) or good quality but high latency (VNC). How I achieve both?