On 2023-03-30 10:56, Per Jessen wrote:
Carlos E. R. wrote:
On 2023-03-30 10:15, Per Jessen wrote:
Carlos E. R. wrote:
Hi,
New machine (Lenovo L14 Gen3). Full disk encryption using discrete partitions with the same password ("/", "/home", swap).
On boot, the Lenovo logo flashes instantly and the prompt for the disk encryption key pops fast. At this point, ctr-alt-del is ignored. There is no time nor message to press F1 for bios config or F12 for boot menu.
I have to press and hold the power button for 4 seconds to power off, then power up again, and start pressing F1 or F12 fast, so that it is read. Slow pressing doesn't work. Press F1 and hold doesn't work.
Question: Is it possible to insert a delay?
Many BIOS'es allow you to enable "slow" POST, e.g. with full memory check and a summary display before booting. Some also have an option to always stop after POST. Even in "quick" mode, you have to be able to enter the BIOS setup and/or choose your boot medium.
Before I installed, the process went more leisurely. I had time enough while it looked at the USB install system.
Once installed with encryption, the prompt for the password happens way too fast. The thing is, the machine does its "boot things", takes several seconds, ignores keypresses, then says "press f1 for setup", and half a second later that goes out and prompts for the password. That's the interval where the F1 key is accepted. Half a second.
In my experience, interrupting the process with F1/F2/Enter/Delete/F8/F12/F10 is also accepted before that minimal pause.
Not in my machine. I tried.
You have to be able to access the BIOS settings or change the boot medium.
Yes, the trick in my machine is to tap the key hundreds of times since the led light goes up till it responds.
Then it expects the password and keyboard does not any longer reads F1, not even ctrl-alt-supr.
Well, by that time the machine is booting, too late for any BIOS intervention.
I think this is a bug in the grub code used when the disk is encrypted. I will create a bugzilla. -- Cheers / Saludos, Carlos E. R. (from 15.4 x86_64 at Telcontar)