Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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:
$ xrandr Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384 eDP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 294mm x 165mm 3840x2160 60.00*+ 59.98 59.97 48.00 3200x1800 59.96 59.94 2880x1620 59.96 59.97 2560x1600 59.99 59.97 2560x1440 59.99 59.99 59.96 59.95 2048x1536 60.00 1920x1440 60.00 1856x1392 60.01 1792x1344 60.01 2048x1152 59.99 59.98 59.90 59.91 1920x1200 59.88 59.95 1920x1080 60.01 59.97 59.96 59.93 1600x1200 60.00 1680x1050 59.95 59.88 1400x1050 59.98 1600x900 59.99 59.94 59.95 59.82 1280x1024 60.02 1400x900 59.96 59.88 1280x960 60.00 1440x810 60.00 59.97 1368x768 59.88 59.85 1280x800 59.99 59.97 59.81 59.91 1280x720 60.00 59.99 59.86 59.74 1024x768 60.04 60.00 960x720 60.00 928x696 60.05 896x672 60.01 1024x576 59.95 59.96 59.90 59.82 960x600 59.93 60.00 960x540 59.96 59.99 59.63 59.82 800x600 60.00 60.32 56.25 840x525 60.01 59.88 864x486 59.92 59.57 700x525 59.98 800x450 59.95 59.82 640x512 60.02 700x450 59.96 59.88 640x480 60.00 59.94 720x405 59.51 58.99 684x384 59.88 59.85 640x400 59.88 59.98 640x360 59.86 59.83 59.84 59.32 512x384 60.00 512x288 60.00 59.92 480x270 59.63 59.82 400x300 60.32 56.34 432x243 59.92 59.57 320x240 60.05 360x202 59.51 59.13 320x180 59.84 59.32 DP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 1920x1080 60.00* 50.00 59.94 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x720 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08
Why is this so, and what do I do to get the UHD resolution? I would really like to match my laptop resolution (in fact, this was why I bought this monitor).
The box says 4K UHD 3840x2160 resolution. Any suggestions?
Many thanks, Ranjan
On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra maitra@email.com wrote:
Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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:
$ xrandr Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384 eDP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 294mm x 165mm 3840x2160 60.00*+ 59.98 59.97 48.00 3200x1800 59.96 59.94 2880x1620 59.96 59.97 2560x1600 59.99 59.97 2560x1440 59.99 59.99 59.96 59.95 2048x1536 60.00 1920x1440 60.00 1856x1392 60.01 1792x1344 60.01 2048x1152 59.99 59.98 59.90 59.91 1920x1200 59.88 59.95 1920x1080 60.01 59.97 59.96 59.93 1600x1200 60.00 1680x1050 59.95 59.88 1400x1050 59.98 1600x900 59.99 59.94 59.95 59.82 1280x1024 60.02 1400x900 59.96 59.88 1280x960 60.00 1440x810 60.00 59.97 1368x768 59.88 59.85 1280x800 59.99 59.97 59.81 59.91 1280x720 60.00 59.99 59.86 59.74 1024x768 60.04 60.00 960x720 60.00 928x696 60.05 896x672 60.01 1024x576 59.95 59.96 59.90 59.82 960x600 59.93 60.00 960x540 59.96 59.99 59.63 59.82 800x600 60.00 60.32 56.25 840x525 60.01 59.88 864x486 59.92 59.57 700x525 59.98 800x450 59.95 59.82 640x512 60.02 700x450 59.96 59.88 640x480 60.00 59.94 720x405 59.51 58.99 684x384 59.88 59.85 640x400 59.88 59.98 640x360 59.86 59.83 59.84 59.32 512x384 60.00 512x288 60.00 59.92 480x270 59.63 59.82 400x300 60.32 56.34 432x243 59.92 59.57 320x240 60.05 360x202 59.51 59.13 320x180 59.84 59.32 DP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 1920x1080 60.00* 50.00 59.94 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x720 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08
Why is this so, and what do I do to get the UHD resolution? I would really like to match my laptop resolution (in fact, this was why I bought this monitor).
The box says 4K UHD 3840x2160 resolution. Any suggestions?
Some additional information: the laptop is a Dell XPS 13 circa 2018, and has an i7 processor. I don't quite recall how to provide information of the graphics card, but it is whatever the laptop came with.
Many thanks, Ranjan
On Tue, 21 Apr 2020 12:40:30 -0500 Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra maitra@email.com wrote:
Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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?
I would check the rating on your HDMI cable, the older ones aren't supposed to be able to support greater than 1080p rates, so if you cable is very old it may not support the speed.
There is probably something written on the cable ends and/or the side of the cable itself. Mine says high speed on the side which indicates it can support at best 4k-30 and is an hdmi 1.4 cable (assuming the ends themselves are also compliant) but nothing more.
see: https://en.wikipedia.org/wiki/HDMI
On Tue, Apr 21, 2020 at 1:51 PM stan via users users@lists.fedoraproject.org wrote:
On Tue, 21 Apr 2020 12:40:30 -0500 Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra maitra@email.com wrote:
Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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? _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-leave@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
On Tue, 21 Apr 2020 11:49:59 -0700 stan via users users@lists.fedoraproject.org wrote:
On Tue, 21 Apr 2020 12:40:30 -0500 Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra maitra@email.com wrote:
Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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.
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.
Many thanks, Ranjan
On Tue, 21 Apr 2020 at 16:30, Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 11:49:59 -0700 stan via users < users@lists.fedoraproject.org> wrote:
On Tue, 21 Apr 2020 12:40:30 -0500 Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra maitra@email.com wrote:
Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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 _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-leave@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
On Tue, 21 Apr 2020 17:47:14 -0300 "George N. White III" gnwiii@gmail.com wrote:
On Tue, 21 Apr 2020 at 16:30, Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 11:49:59 -0700 stan via users < users@lists.fedoraproject.org> wrote:
On Tue, 21 Apr 2020 12:40:30 -0500 Ranjan Maitra maitra@email.com wrote:
On Tue, 21 Apr 2020 12:17:24 -0500 Ranjan Maitra maitra@email.com wrote:
Hi,
I recently got myself a UHD monitor.
https://www.amazon.com/dp/B07JXCR263?tag=aboutcom02lifewire-20&linkCode=...
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.
Thanks very much! I just wanted to make sure. I do not want to lose the laptop in this isolationist environment.
I have a different question, and that is, that the laptop has a HiDPI screen so needed tweaks to .Xresources to get it to display in a readable way. However, this is not needed for the attached monitor so is it possible to set things up so that the laptop screen scales things differently from the monitor? I have the following in my .Xresources for the laptop screen.
!-------------------------------------------- ! Custom DPI !-------------------------------------------- ! Xft.dpi: 192 Xft.autohint: 0 Xft.lcdfilter: lcddefault Xft.hintstyle: hintslight Xft.hinting: true Xft.antialias: 1 Xft.rgba: rgb Xcursor.size: 32
---------------------------------
Which looks fine on my laptop but things look fuzzier on the monitor. How do I get this to be higher resolution for the monitor and it to also work on the HiDPI screen? I use openbox as my WM (and do not use a DE).
Many thanks and best wishes, Ranjan
On Tue, 21 Apr 2020 14:27:18 -0500 Roger Heflin rogerheflin@gmail.com wrote:
I would check the rating on your HDMI cable, the older ones aren't supposed to be able to support greater than 1080p rates, so if you cable is very old it may not support the speed.
There is probably something written on the cable ends and/or the side of the cable itself. Mine says high speed on the side which indicates it can support at best 4k-30 and is an hdmi 1.4 cable (assuming the ends themselves are also compliant) but nothing more.
Thanks, I guess my problem with the USB-C hub.
Best wishes, Ranjan
On Tue, 2020-04-21 at 14:30 -0500, Ranjan Maitra wrote:
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.
That is going to depend on the laptop design. It's not just the screen that users power, generates heat, etc.
If the laptop relies on the lid being open for ventilation, then you need to do so. i.e. Is all the cooling ventilation through the bottom and sides, or are their some grilles around the keyboard?
On Wed, 22 Apr 2020 at 04:49, Tim via users users@lists.fedoraproject.org wrote:
On Tue, 2020-04-21 at 14:30 -0500, Ranjan Maitra wrote:
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.
That is going to depend on the laptop design. It's not just the screen that users power, generates heat, etc.
If the laptop relies on the lid being open for ventilation, then you need to do so. i.e. Is all the cooling ventilation through the bottom and sides, or are their some grilles around the keyboard?
Most laptops have cooling fans that blow air over heatsinks for CPU and GPU. Over time, dust can collect and reduce cooling. At my former work IT bought a large batch of Thinkpads that were particularly prone to overheating (and crashing) on warm days due to accumulated dust. Fortunately it was relatively easy to remove the keyboard to expose the cooling fan and ducts. A few blasts of canned air would release a cloud of dust and give you a month or two before a repeat was required. Newer Thinkpads didn't suffer from this problem, so perhaps laptop designers have found ways to prevent accumulation of dust.
On Wed, 22 Apr 2020 17:18:05 +0930 Tim via users users@lists.fedoraproject.org wrote:
On Tue, 2020-04-21 at 14:30 -0500, Ranjan Maitra wrote:
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.
That is going to depend on the laptop design. It's not just the screen that users power, generates heat, etc.
If the laptop relies on the lid being open for ventilation, then you need to do so. i.e. Is all the cooling ventilation through the bottom and sides, or are their some grilles around the keyboard?
So, I can't find anything that that looks like has perforations. Keeping the lid closed does have one advantage of collecting less dust on the keyboard, from what i can tell.
Ranjan
On Wed, 2020-04-22 at 07:52 -0300, George N. White III wrote:
Most laptops have cooling fans that blow air over heatsinks for CPU and GPU. Over time, dust can collect and reduce cooling. At my former work IT bought a large batch of Thinkpads that were particularly prone to overheating (and crashing) on warm days due to accumulated dust. Fortunately it was relatively easy to remove the keyboard to expose the cooling fan and ducts. A few blasts of canned air would release a cloud of dust and give you a month or two before a repeat was required. Newer Thinkpads didn't suffer from this problem, so perhaps laptop designers have found ways to prevent accumulation of dust.
Mine had fan vents on the bottom and the rear. Having one on its bum meant that you couldn't actually sit the laptop on your lap without blocking a crucial vent. You also have connectors sticking out in stupid places. It makes you wonder what kind of idiot designed it.
-
George N. White III -
Ranjan Maitra -
Roger Heflin -
stan -
Tim