OK, I tried now several installations of GhostBSD - both 25.02 & 26.1, with xlibre & xorg - on 5 different laptops.
1) Dell Latitude 7470 (sorry: not 7490), Intel i5, Intel UHD graphics (on board) with 8GB RAM, 256GB SSD, Wlan (to be added)
- installation worked right from the start via USB-DVD-drive (26.1 tested) and a persistent reFind - (only refind, BSD loader not recognised at all after installation & restart).
- With all stick installation attempts (written the "iso-way", one Toshiba, one scandisk, even on different ports) it did not find any bootable devices after a 2nd (!) restart, only a first restart after installation worked, at least with reFind, with secure boot off and on UEFI.
- as the wlan chip couldn t be detected or configured, I just tested it with LAN cable and DHCP, which worked out of the box
- for wlan, I have to check Ser.No. of Dell again to give exact description of chip model and rev., as only LAN conncetion worked with that Dell model.
2) Lenovo Thinkpad T520, 8GB RAM, Intel i7 - 2640M, Intel Graphics 2nd gen, Samsung 128GB SSD
- with same Toshiba USB-stick, worked out of the box (26.1), with DVD (Matsushita HL-DT-STDVDRAM) and GBSD 25.02-R14-3.p2 (xorg) had to put boot sequence in BIOS on "UEFI & legacy", but UEFI first priority) to get DVD started. From this I upgraded to actual xorg-based 26.1-p8.
For the Toshiba stick it best worked on pure UEFI (BIOS).
Tried then both reFind & BSD-loader. BSD-loader again not working, reFind with Stick rebooted once after installation, then 2nd boot: "no boot device found"; with (internal) DVD, it keeps a persistent reFind,
Then upgraded from 25.02 to 26.1-R15.p8 on xorg-server, which is now running on it with Bash as default (!) shell.
3) Lenovo Thinkpad L14, 2nd generation, AMD Ryzen 5-4500U, 8GB, 256GB SSD and Radeon graphics
- both Toshiba USB-stick & GhostBSD USB-DVD (with 26.1-R15.0-p2 xlibre) worked into live-session and with the USB-DVD version also a working/persistent Xfce desktop after reboot with reFind. Toshiba stick not tested with real installation (only live).
4) Lenovo G50-45, 16GB RAM, AMD A6 cpu, Radeon R5 (?) > ToDo!
- both Toshiba USB-stick with 26.1 & two DVD with 26.1 & 25.02-R14-3p2 in UEFI mode did not boot into live-session.
Then with Toshiba stick (in BIOS conf. as USB-HDD, as EFI stick conf. in BIOS boot section got no start poss.) it did start into boot process, but then problem: "shell cant be found" and it sugg. to use "/rescue/bin" as path for the shell, which ends in commandshell with "OK" and end of boot process.
Then with mix in BIOS with "UEFI + legacy support" and both DVD versions (25.02R14-3p2 (xorg) & 26.1 (xlibre)) it always ended with a reboot after trying to load support for "AMDGPU".
The only fix installation on this G50 machine was achieved with a FreeBSD 14.3- version via internal DVD.
5) Toshiba Portege R30-A-19E, 8GB RAM, intel 4th gen, core i5, intel UHD graphics, 256GB SSD
- installation with both 25.02 R14-3.p2 (xorg) and 26.1 (xlibre) on internal DVD went well. With xlibre until p5, then with upgrade on version p8 it seems to rely on zsh as default. I always changed (till then) default shell via "passwd" to Bash, but then got stuck in login-screen. I also may have used wrong VirtualBox-packages under xlibre (the one with xorg-supprt for VB-additions), then again stuck on login-screen with no mouse & keyboard.
I tested now last installation with Toshiba stick (GhostBSD 26.1 ...) as live medium and did a fix installation of GhostBSD 26.1 DVD version with xlibre (internal drive) and with the latter have now achieved a persistent reboot with both reFind & BSD-loader, and kept the latter now on my Toshiba Portege.
so used:
Toshiba & sandisk ultra flair 3.0 as stick with GhostBSD 26.1-R15.0-p2 and
DVD+R with GhostBSD 25.02-R14-3p2 (xorg) + 25.02-R14-3p2 (xlibre) +
GhostBSD 26.1-R15.0.p2 as installation versions