Sometimes USB disks do not show up on first boot, I have to press Ctrl+Alt+Delete a few times for it to appear

[Dalao]

I'm using coreboot with seabios on Thinkpad T420. I found that sometimes USB disks do not show up on first code boot (press the power button), possibly due to slow on detection? If I press Ctrl+Alt+Delete a few times, they will appear in the list.

Recently I used clonezilla for backup and I was inspired by this feature. Clonezilla has the following screen that it will detection disks periodically until it find the disk. So I wonder could seabios implement features like this that after I press the ESC, the list will update periodically?

```
Every 3.0s: ocs-scan-disk       
2020/03/21 03:22:25
You can insert storage device into this machine now if you want to use that, then wait for it to be detected.
Scanning devices... Available disk(s) on this machine:
===================================
Excluding busy partition or disk...
/dev/sdb: Innostor_ Innostor_Innostor_0000000797508878-0:0 16.0GB
===================================
Update periodically. Press Ctrl-C to exit this window.
```

[Paul Menzel]

Dear Dalao,

Am 20.03.20 um 20:58 schrieb Dalao:
> I'm using coreboot with seabios on Thinkpad T420. I found that
> sometimes USB disks do not show up on first code boot (press the
> power button), possibly due to slow on detection? If I press
> Ctrl+Alt+Delete a few times, they will appear in the list.
>
> Recently I used clonezilla for backup and I was inspired by this
> feature. Clonezilla has the following screen that it will detection
> disks periodically until it find the disk. So I wonder could seabios
> implement features like this that after I press the ESC, the list
> will update periodically?

[…]

Please let’s fix the root cause. Please attach the logs of coreboot with 
log level `DEBUG` and SeaBIOS log level set to at least 5 by attaching 
the output of `cbmem -1` from a boot where the USB device was not 
detected, so the developers know about the used versions and debug 
messages. Please also mention, if this happens with all USB ports and 
different USB storage devices or just this one.

Additionally, I believe that it should work out of the box, and Ctrl + 
Alt + Del is a good enough solution in case it does not work.

Kind regards,

Paul

[Dalao]

> Please let’s fix the root cause. Please attach the logs of coreboot with log level `DEBUG` and SeaBIOS log level set to at least 5 by attaching the output of `cbmem -1` from a boot where the USB device was not detected, so the developers know about the used versions and debug messages. Please also mention, if this happens with all USB ports and different USB storage devices or just this one.

Thank you Paul and I have now set coreboot log level to DEBUG and SeaBIOS log level to 5 and attached the result. This is when the USB device not detected. This sometimes happens randomly not only on this USB disk but also other USB storages as well, and also not just this port.
> Additionally, I believe that it should work out of the box, and Ctrl + Alt + Del is a good enough solution in case it does not work.

I have seen many time the USB works well under Linux but not detected at first code boot using SeaBIOS. It's hard to say repeatedly pressing Ctrl+Alt+Delete is a good solution, because sometimes it still doesn't appear after three times or five times of repeating these steps, then people go crazy...

Mar 21, 2020, 04:58 by [e-mail]:
> Dear Dalao,
>
> Am 20.03.20 um 20:58 schrieb Dalao:
> > I'm using coreboot with seabios on Thinkpad T420. I found that
> > sometimes USB disks do not show up on first code boot (press the
> > power button), possibly due to slow on detection? If I press
> > Ctrl+Alt+Delete a few times, they will appear in the list.
> >
> > Recently I used clonezilla for backup and I was inspired by this
> > feature. Clonezilla has the following screen that it will detection
> > disks periodically until it find the disk. So I wonder could seabios
> > implement features like this that after I press the ESC, the list
> > will update periodically?
>
> […]
>
> Please let’s fix the root cause. Please attach the logs of coreboot with log level `DEBUG` and SeaBIOS log level set to at least 5 by attaching the output of `cbmem -1` from a boot where the USB device was not detected, so the developers know about the used versions and debug messages. Please also mention, if this happens with all USB ports and different USB storage devices or just this one.
>
> Additionally, I believe that it should work out of the box, and Ctrl + Alt + Del is a good enough solution in case it does not work.
>
> Kind regards,
>
> Paul