Screen rotate

4 1115
I have 7" LCD connected. Need to rotate it on 180deg, for best view angle.
I've checked posts in a neighboring forums like banana pi etc (like this http://forum.lemaker.org/thread-22657-1-1.html) but did not get luck. Can anyone help with this? May be with another OS like raspbian or ubuntu.
Found some way...

Replace /usr/bin/X with /usr/bin/X.original
Replace /usr/bin/Xorg with /usr/bin/Xorg.original

write to /etc/xorg.conf:

# X.Org X server configuration file
Section "Device"
        Identifier      "lvds"
        Driver          "fbdev"
Option "Rotate" "UD"

Section "Monitor"
        Identifier      "Monitor"

Section "Screen"
        Identifier      "Screen"
        Monitor         "Monitor"
        Device          "Video Device"

- need to add touch calibration (driver ctp_ft5x06)
- GPU acceleration is not working now (here is some info http://wiki.lemaker.org/LeMaker_Guitar:GPU_hardware_acceleration)

Any suggestions?

Touch calibration can be done by following:

apt-get install xinput-calibrator

then run xinput_calibrator in the terminal

copy output to xorg.conf

I have the following:

Section "InputClass"
    Identifier  "calibration"
    MatchProduct        "ft5x06"
    Option      "Calibration"   "1012 -2 593 9"
    Option      "SwapAxes"      "0"


Besides this, I have added to /etc/modprobe.d/blacklist-guitar.conf  10" LCD driver:

blacklist ctp_gt9xx

If not, you will get error mesages (on dmesg output) because of module conflict on i2c bus:

[   18.795144] <<-GTP-ERROR->> I2C Read: 0x814E, 10 bytes failed, errcode: -6! Process reset.
[   18.803447] <<-GTP-INFO->> Guitar reset
[   18.917981] <<-GTP-ERROR->> I2C transfer error. errno:-6

[   18.925099] <<-GTP-ERROR->> I2C Read: 0x814E, 10 bytes failed, errcode: -6! Process reset.
[   18.933395] <<-GTP-INFO->> Guitar reset
[   19.048038] <<-GTP-ERROR->> I2C transfer error. errno:-6

[   19.055205] <<-GTP-ERROR->> I2C Read: 0x814E, 10 bytes failed, errcode: -6! Process reset.
[   19.063512] <<-GTP-INFO->> Guitar reset


So the question is still available: how to rotate screen when using GPU acceleration (XSGX, pvr_driver, etc) ?

Linux is one of my favorite Operating system but when ever I start my writing work for https://www.paperwritingpro.com/our-services/coursework/ there is an Error occur of screen. It always happen to me I don't know Why my screen stating rotating to left to right and similarly right to left. I want to fix this issue ASAP and I think you can help me out to do so. Please let me know How I can Fix it.

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