How to edit GRUB of live install?

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Ubuntu Version: 25.04 and 25.10

Desktop Environment GNOME

Problem Description:
On my Dell Inspiron 3793 With recent Ubuntu releases (since kernel 6.2) I have an old bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2015670
A Kernel loop PCIe Bus Error on RTL810xE fills the log. To bypass the problem I modify default/grub adding “pcie_aspm=off” to GRUB_CMDLINE_LINUX_DEFAULT.
So the problem is ‘solved’ in the installed OS but the loop occurs also in the live session disturbing the installation.
I know you can edit the live GRUB before starting the installation clicking on ‘Try or install Ubuntu’ when the install start, but I don’t know how. Can you help me? Thank you.

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When you reach “Try or Install Ubuntu”, press e to edit
Add your text pcie_aspm=off after quiet splash
Or even remove quiet splash to see what is happening during the live boot
Ctrl x or F10 to boot

I realise that it’s not strictly the GRUB_CMDLINE_LINUX_DEFAULT but it may work.

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