On Tue, 21 Apr 2020 at 16:30, Ranjan Maitra <maitra@xxxxxxxxx> wrote:
On Tue, 21 Apr 2020 11:49:59 -0700 stan via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, 21 Apr 2020 12:40:30 -0500
> Ranjan Maitra <maitra@xxxxxxxxx> wrote:
>
> > On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra <maitra@xxxxxxxxx>
> > wrote:
> >
> > > Hi,
> > >
> > > I recently got myself a UHD monitor.
> > >
> > > https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=ogi&th=1&psc=1&ascsubtag=4138562%7Cneef17e57867342f0bc4b3af20a9ba60801
> > >
> > > However, when I connect to my 3840x2160 resolution laptop and use
> > > xrandr (through HDMI, supplied with the monitor) I do not even get
> > > an option for 3840x2160. Here is what I get:
>
> I see this in your original email in the xrandr output.
> > 3840x2160 60.00*+ 59.98 59.97 48.00
> Does that not indicate that it is running at 3840x2160 at 60Hz?
Sorry, this line was for the laptop screen. But i have realized the issue. A USB-C to HDMI 2.0 is needed, apparently the type-C multihub sold by Dell does not work for UHD. Changing to the USB-C to HDMI dongle has fixed the issue and 3840x2160 is available.
Life would be so much easier without cables and connectors.
I have a different question however: is it safe to work now with the lid closed or will the laptop overheat? I have switched off the screen for the laptop using xrandr.
With the internal screen off the heat production should be reduced. The laptop shouldn't overheat, but may slow down, depending on ambient temperatures. In our globally warmer future, seasonal migration may be necessary to keep laptops running at full speed.
There are several tools to monitor temperatures, fan speed, and CPU loads. I've never needed to worry about GPU overheating, so I'm not sure what, if any, instrumentation is available.
Many thanks,
Ranjan
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