On Saturday, 6 July 2024 17:11:23 BST Dale wrote: > Michael wrote: > > On Saturday, 6 July 2024 10:59:30 BST Dale wrote: > >> Mark Knecht wrote: > >>> On Tue, Jul 2, 2024 at 12:44 PM Dale <rdalek1...@gmail.com > >>> <mailto:rdalek1...@gmail.com>> wrote: > >>> <SNIP> > >>> > >>>> I tried it with those options and without. Neither changed anything. > >>>> I > >>>> originally tried it with no xorg.conf at all. I was hoping maybe the > >>>> Nvidia GUI thing would adjust things. I may try that again. No > >>>> xorg.conf and use the GUI thing. That's what I use to set up my TV and > >>>> such anyway. Thing is, the sddm screen is HUGE too. > >>> > >>> <SNIP> > >>> > >>>> :-) :-) > >>> > >>> ??? > >>> > >>> xdpyinfo | grep -B2 resolution > >>> > >>> ??? > >> > >> I booted my new rig up again. Dang that thing. It was HUGE again. I > >> started reading stuff, mainly about xorg.conf and the available > >> settings. I changed all sorts of stuff, including some things Micheal > >> suggested. I restarted DM each time. I was about ready to toss it in > >> the old minnow pond, that's where everything goes to die here. Lots of > >> CRT monitors in there. LOL Anyway, I had to install that package to > >> run that command. It spit out a oops when I tried to run it after a > >> copy and paste. I also installed it on my main rig, just to compare. > >> On the new rig, the DPI was a fairly large number. I thought I had the > >> output saved but it seems to be gone. My main rig tho showed 80x80 dots > >> per inch. I did a duck search, finally found how to set that. I then > >> restarted DM and YEPPIE!!! It was a normal size again. > >> > >> Now the monitor on my main rig is a bit older too. Maybe 6 or 7 > >> years??? Should newer monitors be set to a higher number for DPI? Is > >> that normal? Why was it using such a high number by default? I want to > >> say one was like 200 or something. It was quite large. The reason I'm > >> asking, I may need to set something else to make the screen the right > >> size but let it use that larger dpi number, if that is what the newer > >> monitor prefers to use. > >> > >> Now to reboot, see if I have thoughts of that minnow pond again. :/ > >> > >> Dale > >> > >> :-) :-) > > > > I'm struggling to follow your post because you do not provide specific > > information on the commands you input, the output you get in your terminal > > and the observed changes in the monitor. > > > > You also don't provide info on the changes you made in your xorg.conf, or > > xrandr and the corresponding changes observed each time in your > > Xorg.0.log. > > > > Strictly speaking, the pixel density of an on-screen digital image is > > referred to as Pixels Per Inch (PPI), but the term DPI which refers to a > > printed image of ink Dots Per Inch has stuck. > > > > In addition, there is the physical pixel density of your monitor and the > > rendered pixel density of the X11 image(s). Tweaking the latter allows > > you to scale the display and make images look larger than the native > > monitor resolution. > > > > You can set the DPI in your xorg.conf, or you can set it with xranrd, or > > you can set it on the CLI when you launch X, but usually this is not > > necessary and could mess up the scaling of your fonts, window decorations > > and symbols too (the font DPI is set differently by setting Xft.dpi: in > > ~/.Xresources, of the window manager's/DE font settings). > > > > A good starting point is to get the manual of your monitor and look at its > > published native resolution, e.g. 1920x1080 and the physical monitor size > > over which this resolution is displayed. Let's assume this 1920x1080 > > native resolution belongs to a 23" monitor. A 23" diagonal would > > correspond to a 20" wide screen real estate. Consequently the horizontal > > PPI would be: > > > > PPI = 1920 pixels / 20" = 96 > > > > The same resolution on a 24" wide monitor would give a PPI of: > > > > PPI = 1920 pixels / 24" = 80 > > > > Obviously a physically wider 24" monitor with the same native screen > > resolution as a smaller 20" monitor will not look as sharp when viewed > > from > > the *same* distance. > > > > Similarly, changing the selected resolution on the same 23" monitor from > > say 1920 pixels wide to a lower resolution of 1280 pixels gives a PPI of > > 64. > > > > I leave the calculation of the vertical PPI to the reader. > > > > Usually I start with no xorg.conf and leave the card to detect what the > > monitor prefers, then use the Scale setting in the desktop settings to > > increase/decrease (zoom in/zoom out) the displayed scale. This has the > > effect of altering the PPI to higher or lower values to improve > > readability of content. The above should help you arrive at some > > practical resolution, but I would start with the native resolution of the > > monitor and work down from there if you find it difficult to read its > > display. > > > > NOTE: Using Qt scaling can mess up window decorations, widgets, etc. I've > > found it doesn't work well with some KDE applications and their menus/ > > submenus, or pop up windows. You need to set PLASMA_USE_QT_SCALING=1 to > > make it follow Qt scaling and there's GTK3 too which may need tuning. > > This is the reason I calculate PPI before I venture into buying a new > > monitor, unless I can see it in person to make sure I can still read its > > content. ;-) > The reason I picked Mark's post is that I used the command he gave to > find out the DPI info was different from my main rig. When I first > booted up and started DM, I got that HUGE screen again. It worked last > time. I hadn't changed anything. I sometimes wonder still if it reads > xorg.conf each time. Anyway, when it didn't work, I started reading up > a bit. I tried several things including checking options you posted but > nothing worked. It stayed HUGE. Then I ran the command Mark gave and > noticed the difference in DPI between my main rig and the new rig. I > then found out how to set that in xorg.conf and set it the same as my > main rig. As soon as I restarted DM, the screen came up the correct > size. The HUGE part was gone. When I rebooted, it was still the normal > size. It also worked each time I restarted DM. The only change is > setting DPI. Like this: > > > Section "Monitor" > Identifier "Monitor0" > VendorName "Unknown" > ModelName "Samsung LS32B30" > Option "PreferredMode" "1920x1080_60.00" > Option "DPMS" > Option "DPI" "80 x 80" > > > I just booted the new rig again and it has a normal display. None of > that huge stuff. I think I've rebooted like three times now and it > worked every time. I think that is the most reboots with a config that > works since I built this rig. Usually, it works once, maybe twice, then > fails. Later on, it might work again. This machine is like rolling > dice. You never know what you going to get. Three consecutive reboots > with it working gives me hope on this one. I won't be surprised if when > I hook up a second monitor or the TV that it breaks again tho. ;-) > > My only question now, is that a good setting or is there a better way to > make sure this thing works, each time I reboot? > > Dale > > :-) :-)
Is this your monitor? https://www.samsung.com/us/business/computing/monitors/flat/32--s30b-fhd-75hz-amd-freesync-monitor-ls32b300nwnxgo/#specs If the screen is 27.5" wide and 15.47 high, then at a native 1,920 x 1,080 pixel resolution the DPI would be approx. 70x70. However, if you're happy with the way it looks @80x80, then that's a good setting. After all, you're the one looking at it! :-)
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