# Matrix only using every two rows?

**URL:** <https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61>\
**Category:** Uncategorized\
**Created:** [January 1, 2021, 9:11pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61 "2021-01-01T21:11:36Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![UnloosedCake](https://avatars.discourse-cdn.com/v4/letter/u/edb3f5/32.png) [@UnloosedCake](https://rpi-rgb-led-matrix.discourse.group/u/UnloosedCake)\
**Post date:** [January 1, 2021, 9:11pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61/1 "2021-01-01T21:11:36Z")

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Using an adafruit bonnet, pi4 and a 32x64 matrix I’ve got it working except it only lights up every two rows no matter what combination of settings i use. If anyone has any ideas I’d be very grateful

 ![image](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/8861da6e635007f899ab60e84576664b34e2ebaf.jpeg)

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**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\
**Post date:** [January 2, 2021, 9:13pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61/2 "2021-01-02T21:13:00Z")

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It’s difficult to help without knowing what settings you are using.

That said, from the picture, it looks like address line B isn’t getting through, either something wrong with your IO output (line used by something else), or a bad cable, or a bad panel.  
Did you read the entire README, and configured your Pi correctly to stop daemons and IO assignment in the Pi boot config?

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**Author:** ![monoelectro](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@monoelectro](https://rpi-rgb-led-matrix.discourse.group/u/monoelectro)\
**Post date:** [July 17, 2022, 5:10am UTC](https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61/3 "2022-07-17T05:10:53Z")

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Hello, I have a similar problem. I am able to run demos using an esp32 board without any black bars in between.

Could you please give a hint about stopping daemons and IO assignment, looks like I missed something in the readme file

Thanks

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**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\
**Post date:** [July 17, 2022, 6:15pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61/4 "2022-07-17T18:15:56Z")

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honestly I can’t tell you more than what’s in the readme.  
I think some kernel configs can take some IO lines that could in turn cause this, but I can’t tell you which one would do what.  
That said, do make sure that all your wiring is good too, that’s probably the first culprit right there.

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**Author:** ![monoelectro](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@monoelectro](https://rpi-rgb-led-matrix.discourse.group/u/monoelectro)\
**Post date:** [July 18, 2022, 12:24pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/matrix-only-using-every-two-rows/61/5 "2022-07-18T12:24:31Z")

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thanks, change to adafruit hat configuration and connected all pins again, now running without problems