# No video on Toradex Apalis IMX8 **URL:** \ **Category:** Yocto Project\ **Created:** [September 1, 2021, 4:14pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051 "2021-09-01T16:14:13Z")\ **Posts on this page:** 9\ **Page:** 2
**Author:** ![drewmoseley](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/drewmoseley/32/47_2.png) [@drewmoseley](https://hub.mender.io/u/drewmoseley)\ **Post date:** [September 10, 2021, 2:13pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/21 "2021-09-10T14:13:18Z")
When you are at the linux prompt, what does “fw\_printenv” work? The config file is “/etc/fw\_env.config”. ---
**Author:** ![pgiangrossi](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/pgiangrossi/32/1247_2.png) [@pgiangrossi](https://hub.mender.io/u/pgiangrossi)\ **Post date:** [September 10, 2021, 2:32pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/22 "2021-09-10T14:32:50Z")
```auto root@apalis-imx8:~# fw_printenv Cannot read environment, using default Cannot read default environment from file root@apalis-imx8:~# cat /etc/fw_env.config /dev/mmcblk0 0x800000 0x2000 /dev/mmcblk0 0x1000000 0x2000 ``` ---
**Author:** ![pgiangrossi](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/pgiangrossi/32/1247_2.png) [@pgiangrossi](https://hub.mender.io/u/pgiangrossi)\ **Post date:** [September 10, 2021, 2:35pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/23 "2021-09-10T14:35:18Z")
I didn’t notice before, but I see that I get an error in U-boot at startup: ```auto U-Boot 2020.04-5.3.0-devel+git.76fd4496a40b (Apr 07 2021 - 07:35:42 +0000) CPU: NXP i.MX8QM RevB A53 at 1200 MHz DRAM: 4 GiB MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2 Loading Environment from MMC... *** Warning - bad CRC, using default environment ``` ---
**Author:** ![pgiangrossi](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/pgiangrossi/32/1247_2.png) [@pgiangrossi](https://hub.mender.io/u/pgiangrossi)\ **Post date:** [September 10, 2021, 2:43pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/24 "2021-09-10T14:43:04Z")
so I did a “env default -a” at the U-boot prompt. Now it works. I don’t really understand what happened there, sorry for the panic but I thought my patch broke mender. ---
**Author:** ![drewmoseley](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/drewmoseley/32/47_2.png) [@drewmoseley](https://hub.mender.io/u/drewmoseley)\ **Post date:** [September 10, 2021, 3:35pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/25 "2021-09-10T15:35:10Z")
That’s still problematic. The environment _should_ be set to the default when you boot the first time. That’s what the `bad CRC` message is indicating. I don’t know what `env default -a` would do differently than that. I’ll try to find some time later today or over the weekend to play with this a bit. ---
**Author:** ![pgiangrossi](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/pgiangrossi/32/1247_2.png) [@pgiangrossi](https://hub.mender.io/u/pgiangrossi)\ **Post date:** [September 13, 2021, 8:11am UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/26 "2021-09-13T08:11:28Z")
OK, thanks for looking into that. BTW, I also notice an error when updating via mender. The update works fine, but I wonder if the error is expected or a mis-configuration on my part: ```auto INFO[0000] Update Module path "/usr/share/mender/modules/v3" could not be opened (open /usr/share/mender/modules/v3: no such file or directory). Update modules will not be a vailable ``` There is no folder called /usr/share/mender/module on my target ---
**Author:** ![drewmoseley](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/drewmoseley/32/47_2.png) [@drewmoseley](https://hub.mender.io/u/drewmoseley)\ **Post date:** [September 13, 2021, 12:58pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/27 "2021-09-13T12:58:32Z")
Yeah, that’s fine. That just means you have not installed any update modules. Drew ---
**Author:** ![drewmoseley](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/drewmoseley/32/47_2.png) [@drewmoseley](https://hub.mender.io/u/drewmoseley)\ **Post date:** [September 21, 2021, 3:05pm UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/28 "2021-09-21T15:05:12Z")
Hi @pgiangrossi are you still having issues with the U-Boot environment? I saw something similar and it turned out we just needed to increase the environment size. [The specific commit is here](https://github.com/mendersoftware/meta-mender-community/pull/246/commits/0f031851e4fd3a533b9228941670293fa4bfdce2). I wrapped that up with your change for overlays as well as changing our modifications to boot.cmd.in to be applied via patch in a [PR here](https://github.com/mendersoftware/meta-mender-community/pull/246). Can you review that, and try it to see if the overlays work for you now? ---
**Author:** ![pgiangrossi](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/pgiangrossi/32/1247_2.png) [@pgiangrossi](https://hub.mender.io/u/pgiangrossi)\ **Post date:** [September 22, 2021, 5:35am UTC](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051/29 "2021-09-22T05:35:57Z")
I have not had any more problems with the U-boot env. Good to know that you may have fixed that by increasing env size. I tested the PR and it works fine. It applies the overlays and the screen is verified to work. Below is the U-boot output. The only issue I see is the “Unknown command '0x9c000000”. Doesn’t seem to break anything, though. ```auto Found U-Boot script /boot.scr 2691 bytes read in 19 ms (137.7 KiB/s) ## Executing script at 83100000 Unknown command '0x9c000000' - try 'help' Loading hdp firmware from 0x000000009c000000 offset 0x0000000000002000 Loading hdp firmware Complete Saving Environment to MMC... Writing to redundant MMC(0)... OK Loading DeviceTree: imx8qm-apalis-v1.1-eval.dtb 166596 bytes read in 22 ms (7.2 MiB/s) 108 bytes read in 10 ms (9.8 KiB/s) Applying Overlay: apalis-imx8_lvds_overlay.dtbo 638 bytes read in 21 ms (29.3 KiB/s) Applying Overlay: apalis-imx8_atmel-mxt_overlay.dtbo 402 bytes read in 19 ms (20.5 KiB/s) Applying Overlay: display-lt170410_overlay.dtbo 834 bytes read in 21 ms (38.1 KiB/s) 10260548 bytes read in 248 ms (39.5 MiB/s) Uncompressed size: 24267264 = 0x1724A00 Bootargs: pci=nomsi root=/dev/mmcblk0p2 ro rootwait ## Flattened Device Tree blob at 83000000 Booting using the fdt blob at 0x83000000 Loading Device Tree to 00000000fcdff000, end 00000000fce4afff ... OK Starting kernel ... ``` [Previous page](https://hub.mender.io/t/no-video-on-toradex-apalis-imx8/4051.md?page=1)