When facing an issue on a unique hardware configuration on the end user side it may prove useful to submit system logs to Dasharo team for diagnosis and possibly problem solution. This section describes how to dump various logs from a running system.
One may use Dasharo Tools Suite HCL report or fwdump-docker image to gather all the hardware configuration information from a running system. The usage of the tools should result in an archive containing various logs from the running system. Submit them via email to firstname.lastname@example.org or use Dasharo pastebin.
When already migrated to Dasharo, it is possible to retrieve firmware logs from
coreboot on a running system. A utility called
cbmem can be used for that
purpose. By obtaining the logs Dasharo team will be able to locate any issues
with the firmware. This method requires Secure Boot to be disabled.
Options to get
- Download precompiled utility from 3mdeb cloud
- Use Dasharo Tools Suite
v1.1.0 or newer which has
cbmemutility built in.
cbmem utility. See procedure below.
Short instruction how to compile and use
cbmem on Ubuntu 22.04 live CD:
- Launch Ubuntu 22.04 live CD and choose to
- Right click on the desktop and choose
Open in Terminal.
Install required packages:
sudo apt-get install -y build-essential libpci-dev
Navigate to tmpfs:
Download and extract coreboot source:
wget https://coreboot.org/releases/coreboot-4.17.tar.xz tar xvf coreboot-4.17.tar.xz
Compile cbmem utility:
cd coreboot-4.17/util/cbmem make
Obtaining Dasharo firmware log
One can obtain the firmware logs with:
```bash sudo ./cbmem -1 > cbmem.log ```
Execute the above command on the target platform. Newer Dasharo distributions will also contain complete logs from UEFI Payload to help debug issues outside of coreboot.
NOTE: UEFI Payload logs are not available on platforms with serial console redirection enabled in the firmware.