Raspberry Pi Forums

Posted: **Fri Mar 20, 2015 9:47 pm**

In this topic I seek the solution to a problem started in the discussion PI2B installation - SD-card problem http://www.raspberrypi.org/forums/viewt ... 95#p723395 I then discovered that the reason for the problematic installation was not the SD-card, but the monitor being used, which was not properly recognized or managed by RPI2.

I therefore considered more correct to open this topic.

Previous attempts to solve the problem can be found in the above reported discussion.

Here I add that the used screen is a LED TV Samsung, model UE32B7000, and that I checked all the possibilities for graphic resolution that the system gave as theoretically available (command output tvservice -m CEA and tvservice -m DMT).

Here is the table with the result of each command tvservice used.

It would seem that none of the possible combinations resulted suitable for the screen of my TV LED which only works with the resolution that Raspbian identified automatically, corresponding to the instructions:

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# NOOBS Settings Auto-generated:
hdmi_ignore_edid = 0xa5000080
hdmi_force_hotplug = 1
config_hdmi_boost = 4
hdmi_group = 2
hdmi_mode = 4

What should I do to improve the situation?
Claudio

Posted: **Fri Mar 20, 2015 11:01 pm**

1. Try another TV
2. Try another HDMI cable
3. Try another RPi with the original cable & TV
4. Try another power supply
5. Visit a friend who has working RPi and try your RPi as a straight swap out for their's.

Posted: **Sat Mar 21, 2015 4:38 pm**

A question ti help on understanding

Premise
After several attempts, I found that my RPI2 with SO Raspbian difficulty recognizes my screen TV Led Samsung, model UE32B7000 (Optimal Resolution 1920 x 1080).
I checked the config.txt settings and relevant data are:

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hdmi_force_hotplug = 1           # Uncomment if hdmi display is not detected and composite is being output
hdmi_ignore_edid = 0xa5000080    # Enables the ignoring of EDID / date display
config_hdmi_boost = 4            # Uncomment to increase to signal to HDMI, if you have interference, blanking, or no display
hdmi_group = 2                   # defines the HDMI type (1 = CEA, 2 = DMT)

With such settings, I can see the screen just decently (entirely, even if disturbed) with (apparent?) resolution 1600x1200@60Hz (this was the indication given directly by the screen software of the device, while the command "tvservice -s" gives

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tvservice -s
0x120016 been [DVI DMT (51) RGB full 4: 3], 1600x1200 @ 60.00Hz, progressive

Here's the image of my screen

My question: how is it possible that the screen works at 1600x1200 if the maximum hardware vertical resolution is 1080 (I recall it's a Led TV)?

Claudio

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PI2B installation - Video problem

PI2B installation - Video problem

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