I have a HDMI 4 Pi that I bought in January. I've built a nice walnut wood case for it and everything. I connect using a short HDMI cable, and I drive it with a 12V benchtop power supply.
Now, when I hook it up to my Raspberry Pi, I can get it to display in 1280x720 mode, which causes the graphics to be slightly stretched vertically. However, I can't get it to display in 1280x800, which is the mode I want.
I need this to display in 1280x800 mode, because I'm using it as a control panel for a software system that's built for this resolution.
When I use the config.txt that you list on your Techincal Resoures page, the display comes up in 640x480 mode, which is not at all what I want.
Note that the "tvserver" command doesn't show "28" as a supported mode number, which is likely why trying that config.txt comes up in 640x480.
Help!
HDMI 4 Pi -- can't get 1280x800 to work
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
What valid modes do you get from `/opt/vc/bin/tvservice -m DMT`?
- jwatte
- Posts: 53
- Joined: Thu May 31, 2012 11:25 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
The modes in DMT are:
Code: Select all
Group DMT has 14 modes:
mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
mode 5: 640x480 @ 72Hz 4:3, clock:31MHz progressive
mode 6: 640x480 @ 75Hz 4:3, clock:31MHz progressive
mode 8: 800x600 @ 56Hz 4:3, clock:36MHz progressive
mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive
mode 10: 800x600 @ 72Hz 4:3, clock:50MHz progressive
mode 11: 800x600 @ 75Hz 4:3, clock:49MHz progressive
mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive
mode 17: 1024x768 @ 70Hz 4:3, clock:75MHz progressive
mode 18: 1024x768 @ 75Hz 4:3, clock:78MHz progressive
mode 36: 1280x1024 @ 75Hz 5:4, clock:135MHz progressive
mode 47: 1440x900 @ 60Hz 16:10, clock:106MHz progressive
mode 48: 1440x900 @ 75Hz 16:10, clock:136MHz progressive
mode 49: 1440x900 @ 85Hz 16:10, clock:157MHz progressive
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
Try using:
and see if that does any good.
Code: Select all
hdmi_ignore_edid hdmi_group=2 hdmi_mode=28
- jwatte
- Posts: 53
- Joined: Thu May 31, 2012 11:25 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
That just did 640x480, but the following worked:
If you update the config.txt on the page http://www.adafruit.com/products/1287#Technical_Details it would probably help others, too!
Probably want to do it here, too: http://www.adafruit.com/products/1694#Technical_Details
Code: Select all
hdmi_ignore_edid=0xa5000080
hdmi_group=2
hdmi_mode=28
Probably want to do it here, too: http://www.adafruit.com/products/1694#Technical_Details
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
Glad to hear you found a configuration that worked.
We try to stick with default values on the product pages to keep things as simple as possible. For situations that require a customized approach, we use this as a resource: http://elinux.org/RPiconfig#Video_mode_options
We try to stick with default values on the product pages to keep things as simple as possible. For situations that require a customized approach, we use this as a resource: http://elinux.org/RPiconfig#Video_mode_options
- jwatte
- Posts: 53
- Joined: Thu May 31, 2012 11:25 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
I don't understand. What's special about my situation? It's a Raspberry Pi model B, and it's your specific display controller board. There is no variant in this equation. Everyone would be having the same problem with this display board.
Or is it the case that the "HDMI 4 Pi" product may ship out a variety of different display control boards, some of which have bugs and some of which don't?
Or is it the case that the "HDMI 4 Pi" product may ship out a variety of different display control boards, some of which have bugs and some of which don't?
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
You're working with a 1200x800 display that doesn't report the correct EDID, yes?
- jwatte
- Posts: 53
- Joined: Thu May 31, 2012 11:25 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
Sorry, I didn't see this response.
Yes, I am working with a 10" TFT display that doesn't do the right EDID.
Specifically, it's the 10" TFT display I purchased FROM YOU (as you can tell by the description in the beginning in this thread, and again from the links to your catalog that I posted.)
So, for ANY CUSTOMER OF YOURS using this display, they will get a horribly scaled 1280x720 image on YOUR DISPLAY that YOU SELL FOR THE RASPBERRY PI, unless they apply this work-around.
Sorry to shout, but I think the things in caps are pretty clear from what I posted in this thread, and it's pretty clear that your documentation for your product isn't particularly helpful. I'm just trying to get you to help your own customers like me in the future, and I'm rather frustrated at the resistance.
Hence, why I think that your product page should list this work-around. I don't understand what's special about that? Do you want your customers of your display that you sell especially for the Raspberry Pi to get poorly scaled graphics, rather than the 1280x800 resolution that you advertise on that page?
Yes, I am working with a 10" TFT display that doesn't do the right EDID.
Specifically, it's the 10" TFT display I purchased FROM YOU (as you can tell by the description in the beginning in this thread, and again from the links to your catalog that I posted.)
So, for ANY CUSTOMER OF YOURS using this display, they will get a horribly scaled 1280x720 image on YOUR DISPLAY that YOU SELL FOR THE RASPBERRY PI, unless they apply this work-around.
Sorry to shout, but I think the things in caps are pretty clear from what I posted in this thread, and it's pretty clear that your documentation for your product isn't particularly helpful. I'm just trying to get you to help your own customers like me in the future, and I'm rather frustrated at the resistance.
Hence, why I think that your product page should list this work-around. I don't understand what's special about that? Do you want your customers of your display that you sell especially for the Raspberry Pi to get poorly scaled graphics, rather than the 1280x800 resolution that you advertise on that page?
- blake3
- Posts: 23
- Joined: Thu May 28, 2015 10:41 am
Re: HDMI 4 Pi -- can't get 1280x800 to work
Jwatte,
I will try your config.txt settings this evening (might work better than what I've got), but in addition, for anyone else struggling with this issue on the 10.1" screens (ID# 1694), see possible fixes in this thread as well:
viewtopic.php?f=47&t=55530
Just trying to tie all these threads together so that others will find this information easier, and I echo Jwatte's opinion about putting something in the tech details for this specific screen. I've now spent days on resolving this audio/resolution issue.
I will try your config.txt settings this evening (might work better than what I've got), but in addition, for anyone else struggling with this issue on the 10.1" screens (ID# 1694), see possible fixes in this thread as well:
viewtopic.php?f=47&t=55530
Just trying to tie all these threads together so that others will find this information easier, and I echo Jwatte's opinion about putting something in the tech details for this specific screen. I've now spent days on resolving this audio/resolution issue.
- jwatte
- Posts: 53
- Joined: Thu May 31, 2012 11:25 pm
Re: HDMI 4 Pi -- can't get 1280x800 to work
Blake3, thanks.
It's interesting the Adafruit support didn't actually answer the request to improve the documentation.
Are Adafruit catalog pages "one and done"? Once written, never to be changed?
It's interesting the Adafruit support didn't actually answer the request to improve the documentation.
Are Adafruit catalog pages "one and done"? Once written, never to be changed?
- blake3
- Posts: 23
- Joined: Thu May 28, 2015 10:41 am
Re: HDMI 4 Pi -- can't get 1280x800 to work
So, some sad news, my previous successes last night proved temporary, and I'm back to no sound, without changing anything except unplugging the system overnight. Additionally, your solution and Andrewsi's from another thread did not work.
So there you have it.
So there you have it.
Please be positive and constructive with your questions and comments.