RPI blurry text
Greg (2474) 143 posts |
Does anyone remember a post on here about blurry text on RPI. If I remember there was a solution for this problem that I need. If anyone does remember could you post the link on here if possible. I cant seem to find it. Thanks |
Rick Murray (539) 13406 posts |
Is your display output from the Pi the same size as your monitor? For instance if you have a 1440×900 monitor and the Pi is sending an 800×600 image, it will be resized by the monitor to fit the display area and… will often look blurry. |
Chris Evans (457) 1614 posts |
Greg: What input port are you using on your monitor? |
Jeffrey Lee (213) 6046 posts |
This thread? |
Greg (2474) 143 posts |
Dont know what happened there. I posted a reply this morning and have been busy all day and just relised it didnt go up. Hmmm. Ill do it again. @ Rick Yes Rick my monitors standard resolution and the PI are both 1920 × 1080 @ Chris Im using a HDMI to Displayport adapter. It works fine on Iyonix and RISC PC ( Until i broke it ) and they are going through a VGA to HDMI adapter as well @ Jeffrey Ahh. That is exactly the one I was looking for thank you. Are you a magician of some kind as I was looking for ages and could not find it. I am also wondering why the PI seems to be quite dark, I suspect it may be a side effect of the blurry issue. If it isnt what can I do to resolve this other than manually ajusting the brightness back and forth each time i changed the machine I am using ( I have 3 machines running through the one monitor ) Thanks Greg |
Clive Semmens (2335) 3130 posts |
Many of us suspect this. |
Jeffrey Lee (213) 6046 posts |
No, just a good memory for code/text. I vaguely remembered the scaling_kernel parameter since it had been mentioned here a few times, and after looking up the correct name for the parameter a search of the forum lead to that thread.
That might be related to whether the Pi is outputting a HDMI or DVI signal. HDMI signals can indicate which colour space they’re using, so it may be that the monitor (or one of your adapters) thinks that the colour space being used by the Pi is different to the colour space being used by the other machines and is trying to translate between colour spaces in a non-useful manner, or applying a different colour preset, etc. Adding hdmi_drive=1 to config.txt will force the Pi to output a DVI signal, which might be a closer match to whatever signal the VGA → HDMI adapter produces (I’m assuming the adapter actually outputs a DVI signal rather than a true HDMI one – or at least, if it does output HDMI it will be advertising a standard PC RGB colour space rather than a TV colour space) But since you’ve got so many different adapters flying around it’s also possible that the VGA → HDMI adapter is boosting the brightness of your VGA sources and making the Pi look darker in comparison. |
Clive Semmens (2335) 3130 posts |
Magicians also use methods to achieve their “impossible” feats – but indeed, you’re not a magician: magicians don’t reveal their methods. |
Rick Murray (539) 13406 posts |
There, fixed it for you. |
Greg (2474) 143 posts |
Finally got round to sorting out my “blurry text” issue. First though I must appologise for incorectly replying to Ricks query at the top of this thread. My desktop was running in the native resolution of the monitor ( 1920×1080 ) but the program I was running was in 640×480 single tasking and this is where I was getting the blurry text. The solution was to add into CONFIG.TXT the line disable_overscan=1. Obviously this also got rid of the black borders but more importantly the blurriness in 640×480 has pretty much gone. It also doesnt seem to be as dark now either. Happy days. Thanks |