# Yellow screen on meta-mender using warrior branch with DISABLE\_VC4GRAPHICS + u-boot patch
**URL:** https://hub.mender.io/t/yellow-screen-on-meta-mender-using-warrior-branch-with-disable-vc4graphics-u-boot-patch/1438
**Category:** General Discussions
**Tags:** raspberry-pi-3, raspberry-pi-4
**Created:** [January 14, 2020, 9:17pm UTC](https://hub.mender.io/t/yellow-screen-on-meta-mender-using-warrior-branch-with-disable-vc4graphics-u-boot-patch/1438 "2020-01-14T21:17:44Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@ikkysleepy](https://hub.mender.io/u/ikkysleepy)
#### Post date: [January 14, 2020, 9:17pm UTC](https://hub.mender.io/t/yellow-screen-on-meta-mender-using-warrior-branch-with-disable-vc4graphics-u-boot-patch/1438/1 "2020-01-14T21:17:44Z")
I experienced a Yellow screen when using the warrior build for Raspberry Pi 3 and Pi 4 when setting DISABLE\_VC4GRAPHICS to 1. I set this variable to 1 because tvservice and libcec (hdmi) was not working and this was the only way to get it to work. There is a fix for this yellow issue but it’s not available in the meta-mender repo, see here for the patch [Yellow Screen on Raspbian Buster 2019-06-20](https://hub.mender.io/t/yellow-screen-on-raspbian-buster-2019-06-20/1136). Here is a patch for u-boot for the meta-mender layer I made that fixes the yellow u-boot issue:
Copy the file to a new directory meta-mender/meta-mender-core/recipes-bsp/u-boot/u-boot/0001-Disable-addition-of-simple-framebuffer-by-U-boot.patch
> From cad2c92cd03558461cc16c6d69035009c153ff61 Mon Sep 17 00:00:00 2001
> From: Jorge Corona [ikkysleepy@yahoo.com](mailto:ikkysleepy@yahoo.com)
> Date: Tue, 14 Jan 2020 12:46:48 -0800
> Subject: [PATCH] Disable addition of simple-framebuffer by U-boot
>
> * * *
>
> board/raspberrypi/rpi/rpi.c | 7 -------
> include/configs/rpi.h | 3 —
> 2 files changed, 10 deletions(-)
>
> diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
> index 8f964d6…71633b4 100644
> — a/board/raspberrypi/rpi/rpi.c
> +++ b/board/raspberrypi/rpi/rpi.c
> @@ -474,13 +474,6 @@ void \*board\_fdt\_blob\_setup(void)
>
> int ft\_board\_setup(void \*blob, bd\_t \*bd)
> {
>
> -
>
> ```
> /*
>
> ```
>
> -
>
> ```
> * For now, we simply always add the simplefb DT node. Later, we
>
> ```
>
> -
>
> ```
> * should be more intelligent, and e.g. only do this if no enabled DT
>
> ```
>
> -
>
> ```
> * node exists for the "real" graphics driver.
>
> ```
>
> -
>
> ```
> */
>
> ```
>
> -
>
> ```
> lcd_dt_simplefb_add_node(blob);
>
> ```
>
> -
>
> #ifdef CONFIG\_EFI\_LOADER
> /\* Reserve the spin table _/
> efi\_add\_memory\_map(0, 1, EFI\_RESERVED\_MEMORY\_TYPE, 0);
> diff --git a/include/configs/rpi.h b/include/configs/rpi.h
> index e9c80e2…2033516 100644
> — a/include/configs/rpi.h
> +++ b/include/configs/rpi.h
> @@ -59,9 +59,6 @@
> /_ Devices _/
> /_ GPIO _/
> #define CONFIG\_BCM2835\_GPIO
> -/_ LCD \*/
> -#define CONFIG\_LCD\_DT\_SIMPLEFB
> -#define CONFIG\_VIDEO\_BCM2835
>
> #ifdef CONFIG\_CMD\_USB
> #define CONFIG\_TFTP\_TSIZE
Next, make a new file called u-boot\_2019.01.bbappend in meta-mender/meta-mender-core/recipes-bsp/u-boot/
> FILESEXTRAPATHS\_prepend := “${THISDIR}/${PN}:”
>
> SRC\_URI += “file://0001-Disable-addition-of-simple-framebuffer-by-U-boot.patch”
I also had to force u-boot to load by adding these lines to my local conf
> MENDER\_FEATURES\_ENABLE\_append = " mender-uboot mender-image-sd"
> MENDER\_FEATURES\_DISABLE\_append = " mender-grub mender-image-uefi"
Thanks,
–Jorge
---
### Author:  [@guillaumekh](https://hub.mender.io/u/guillaumekh)
#### Post date: [January 20, 2020, 5:25pm UTC](https://hub.mender.io/t/yellow-screen-on-meta-mender-using-warrior-branch-with-disable-vc4graphics-u-boot-patch/1438/2 "2020-01-20T17:25:08Z")
> [@ikkysleepy](#):
>
> I experienced a Yellow screen when using the warrior build for Raspberry Pi 3 and Pi 4 when setting DISABLE\_VC4GRAPHICS to 1.
We see the same issue with Yocto Warrior on Raspberry Pi 3 B+, although we don’t disable VC4GRAPHICS.
I couldn’t get the patch to work as is, possibly because Discourse bungled the formatting, so here is the patch regenerated from the [original commit](https://github.com/mendersoftware/uboot-mender/commit/50f05ab10e9590f22cd07382821a7a7721825b36) if anyone else needs it : [0001-Disable-addition-of-simple-framebuffer-by-U-boot.patch · GitHub](https://gist.github.com/guillaumekh/77639b12fb6596d43d12b11f37a59157)