> On 24 Aug 2022, at 16:19, Anil F Duggirala <anilduggir...@fastmail.fm> wrote:
> 
> hello,
> I am noticing that my new Dell S2421HS is detected and identified differently 
> depending on when I connect it.
> If the monitor is connected when I boot up the laptop, the monitor is 
> detected 
> as "Dell Inc. DELL S2421HS". If the monitor is connected after logging in, it 
> is detected as something like "HDMI 1 Unknown - A" (approximately).
> Does anyone have some insight into why this is happening?
> I using KDE Plasma desktiop,

Check dmesg for any messages about the video interface or monitor.
Are there any messages about edid?

Barry

> 
> thank you,
> 
> Anil
> 
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