How is this possible to set prompt time longer?
do you mean by grub menu where you can choose which kernel config you want to load ?
it’s depend on your system, are you using efi / grub? you can change the grub_timeout value to 0 if you want to skip.
No. I mean the system prompts from dom0 in the os. Like if i access keyring with split gpg the prompt is only a part of a second there.
edit the qubes.Gpg.service file and find in this line :
notify-send "Keyring access from domain: $QREXEC_REMOTE_DOMAIN" --expire-time=1000 </dev/null >/dev/null 2>/dev/null & /usr/lib/qubes-gpg-split/gpg-server /usr/bin/gpg2 $QREXEC_REMOTE_DOMAIN
try increasing --expire-time=(1000 is equal to 1s)