silverdragon
Posts: 2
Joined: Sun May 01, 2016 1:09 am

Re: STICKY: Setting up HDMI output when video output is wrong.

Sat Aug 04, 2018 5:23 am

Hi, well I’m wondering if you actually need to power. On/off from the wall ie removing re-powering power from unit, this will master reset things then it maybe detected and remember? Anyhow good luck.

ibeeby
Posts: 7
Joined: Mon Jul 02, 2012 7:04 pm

Re: STICKY: Setting up HDMI output when video output is wrong.

Tue Aug 07, 2018 9:26 pm

Any ideas how I address a 1280x854 display? I have an ex-Apple PowerBook Titanium display panel with a VGA adapter being driven through an HDMI to VGA adapter as a display but the RPi doesn't really drive it properly - there is some munging of the characters and of course the resolution is wrong in either 1280x800 or 1280x900 settings.

Grateful for any thoughts.

Ian

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FTrevorGowen
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Re: STICKY: Setting up HDMI output when video output is wrong.

Wed Aug 08, 2018 8:19 pm

ibeeby wrote:
Tue Aug 07, 2018 9:26 pm
Any ideas how I address a 1280x854 display? I have an ex-Apple PowerBook Titanium display panel with a VGA adapter being driven through an HDMI to VGA adapter as a display but the RPi doesn't really drive it properly - there is some munging of the characters and of course the resolution is wrong in either 1280x800 or 1280x900 settings.

Grateful for any thoughts.

Ian
Since you're using a HDMI-to-VGA adapter:
1) What model type (link or pics. perhaps)**
2) What do these tvservice commands report**** :

Code: Select all

tvservice -n
tvservice -m DMT
tvservice -m CEA
tvservice -s
Trev.
** FWIW, these are those I've used:
http://www.cpmspectrepi.uk/raspberry_pi ... erter.html
http://www.cpmspectrepi.uk/raspberry_pi ... rter2.html
http://www.cpmspectrepi.uk/raspberry_pi ... erter.html
http://www.cpmspectrepi.uk/raspberry_pi ... Audio.html
(the latter two for P0's) - is yours similar?
**** More info./examples here: http://www.cpmspectrepi.uk/raspberry_pi ... tings.html
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

aBUGSworstnightmare
Posts: 942
Joined: Tue Jun 30, 2015 1:35 pm

Re: STICKY: Setting up HDMI output when video output is wrong.

Thu Aug 09, 2018 9:51 am

ibeeby wrote:
Tue Aug 07, 2018 9:26 pm
Any ideas how I address a 1280x854 display? I have an ex-Apple PowerBook Titanium display panel with a VGA adapter being driven through an HDMI to VGA adapter as a display but the RPi doesn't really drive it properly - there is some munging of the characters and of course the resolution is wrong in either 1280x800 or 1280x900 settings.

Grateful for any thoughts.

Ian
Do you have access to the data sheet of your display?
If yes, you should configure Raspbian to ignore EDID data (which is coming from your adapter) and use a custom mode with correct HDMI timing to drive it.

Code: Select all

hdmi_ignore_edid=0xa5000080
This let's the Pi ignore the EDID data.

Have a look at this to get details on custom HDMI mode
https://github.com/raspberrypi/document ... t/video.md

zervanko
Posts: 13
Joined: Sat Jun 23, 2018 6:36 pm

Why option avoid_edid_fuzzy_match=1 not working?

Sun Sep 30, 2018 7:43 am

I set avoid_edid_fuzzy_match=1 to /boot/config.txt But my Raspberry still select lower resolution, because it has 162mhz (due to edidparser output)

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