# Program Overlay at boot time

**URL:** <https://discuss.pynq.io/t/program-overlay-at-boot-time/8846>\
**Category:** Support\
**Created:** [October 29, 2025, 4:15pm UTC](https://discuss.pynq.io/t/program-overlay-at-boot-time/8846 "2025-10-29T16:15:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![bonkbonk](https://avatars.discourse-cdn.com/v4/letter/b/7ab992/32.png) [@bonkbonk](https://discuss.pynq.io/u/bonkbonk)\
**Post date:** [October 29, 2025, 4:15pm UTC](https://discuss.pynq.io/t/program-overlay-at-boot-time/8846/1 "2025-10-29T16:15:55Z")

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hello，In PYNQ version 3.0.1, after I commented out this section and ran **make** , an error occurred.

```auto
user@user-VirtualBox:~/xilinx/PYNQ/sdbuild$ make BOARDS=zynq-7020
Makefile:371: *** recipe commences before first target. Stop.

```

It seems that this post was published quite a long time ago, so I’m not sure if this method still works.

I need to make the HDMI display show the desktop image, and the driver depends on the VTC/VDMA IPs in the PL.  
Therefore, the bitstream must be loaded and the device tree updated during the boot process; otherwise, the DRM/Framebuffer driver won’t be able to find the hardware nodes.  
Could you please tell me how to implement bitstream loading at boot in the current version?

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**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\
**Post date:** [October 29, 2025, 5:52pm UTC](https://discuss.pynq.io/t/program-overlay-at-boot-time/8846/2 "2025-10-29T17:52:07Z")

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Hi @bonkbonk,

I created a new topic to track this.  
You can use the `boot.py` to do this. [PYNQ SD Card image — Python productivity for Zynq (Pynq)](https://pynq.readthedocs.io/en/latest/pynq_sd_card.html#leveraging-boot-py-to-modify-sd-card-boot-behavior)

This is the way the baseoverlay is loaded.

Mario

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**Author:** ![system](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/system/32/2_2.png) [@system](https://discuss.pynq.io/u/system)\
**Post date:** [November 1, 2025, 5:52pm UTC](https://discuss.pynq.io/t/program-overlay-at-boot-time/8846/3 "2025-11-01T17:52:34Z")

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