[ SOLVED ] Grubscreen not showing on single-boot setups - how can I fix this ?

[DeepThought]

Glad to help

[m654321]

As soon as you boot and while the post tests are ongoing press and hold the shift key.
If you are using the UEFI version try pressing te Esc key a few times while it boots up.

Many thanks DeepThough, worked a treat - really appreciate that - you've saved a lot of head-scratching (I'm almost bald as it is)

Also pleased to see that kernel 4.4 now makes this trusty machine work with LL4.6. Yes, I have a legacy system, so the shift-key worked as you mentioned, grubscreen appearing pretty quickly.

Thankyou again 

[DeepThought]

As soon as you boot and while the post tests are ongoing press and hold the shift key.

If you are using the UEFI version try pressing te Esc key a few times while it boots up.

[m654321]

Something I've noticed on our Dell D630 is that when I have a single-boot setup with LL, the laptop boots straight to the Desktop, bypassing the grubscreen. However, this problem is absent with dual-boot setups (either LL/Win or LL/Linux), where the grubscreen shows itself as you'd expect. This no-show of grubscreen, with single-boot setups, also occurs on some of our other machines.

I'm trying LL4.6 as a single-boot setup on the D630: unlike LL3.8, which it whizzes along, it doesn't seem to like LL4.6 (loads of lag on booting). So I've installed the headers & image for the older 4.4 kernel, hoping this will get LL4.6 to work on this 13-year-old machine. However, without the grublist appearing on boot-up, I'm unable to select the 4.4 kernel.  How do I fix this so I can get to select the kernel 4.4 ?

Any help / comments much appreciated ...