1. How do you put exactly those live cds into the USB ? Do you use the DD method or another one?
2. Can you please try Super Grub2 Disk Hybrid with the DD method? https://sourceforge.net/projects/supergrub2/files/2.02s10-beta5/super_grub2_disk_2.02s10-beta5/super_grub2_disk_hybrid_2.02s10-beta5.iso/download Does the menu appear for you? 3. And what about Rescatux with the DD method? Does the grub menu even appear? http://sourceforge.net/projects/rescatux/files/rescatux_0_51_b3/rescatux-0.51b3.iso/download Rescatux has the same method of building than some Debian installation disks (not the live ones). And Super Grub2 Disk has the GNU/GRUB way of making the iso thanks to grub-mkrescue and that's different from the Rescatux / Debian installation implementation. Thank you for your feedback. El 10/12/17 a las 18:38, Michel Bouissou escribió: > Hi, > > In some (south-west) regions of France, high-school students are > currently given (for free - I mean : from our taxes) HP ProBook x360 11 > G1 EE (Education Edition) laptop computers. > > These computers come with Windows 10 and an HP EFI BIOS v. 01.09 to > 01.11 that has no support for legacy CSM boot mode. > > I believe that either this UEFI BIOS has been purposely “locked against > grub”, or there is a serious bug. > > After having disabled Secure boot, I have discovered that none of the > usual (curent, latest versions as of 2017/12) Linux live USB sticks > (among : Ubuntu, Mint, Debian, Manjaro, PartedMagic) was able to boot on > this machine. > > All these live USB keys normally boot using grub. > > Symptoms are as follows : > > - UEFI BIOS selection displays the USB key as "Windows boot manager" > instead of the USB key make / model one is used to see on other machines ; > > - Selecting this just causes the screen to go black with a blinking > cursor and... that's the end. > > - After a while I discovered that a rEFInd key > ( http://www.rodsbooks.com/refind/ ) IS ABLE to boot, and that it "sees" > the Linux key if both inserted at the same time. > > - But trying to chain from rEFInd to the Linux key fails (black screen > of death with blinking cursor) > > - Then I discovered that a Tails Linux key ( https://tails.boum.org ) > boots easily with no problem at all on the machine... And this one boots > from syslinux. > > - I also tested and found that rEFInd is also able to chain to a Tails > key properly. > > - Then I made another experiment and try to "doctor" some Linux keys > that couldn't boot (namely : Parted Magic and Manjaro) to remove grub > from them and replace it with syslinux. It was not an easy task, but > once done, it allowed both distros to boot easily and seamlessly. > > - It is worth specifying that, as soon as grub is replaced with > syslinux, the machine's BIOS doesn't call the key "Windows boot manager" > anymore, but properly displays its brand and model. > > So I can tell being 100% sure that the HP ProBook x360 11 G1 EE > distributed to students in France will *NOT BOOT* any of the common, > grub-based, Linux USB keys, but that it will happily boot the same keys > when grub is replaced with syslinux. > > I cannot tell for sure if this is a purposeful lock on the machine BIOS > or a serious bug somewhere, but I felt that it deserves to be > documented, reported and investigated. > > Please copy me on replies, I'm not subscribed to this mailing-list. > > Best regards. > > > ॐ > -- Support free software. Donate to Super Grub Disk. Apoya el software libre. Dona a Super Grub Disk. http://www.supergrubdisk.org/donate/ _______________________________________________ Help-grub mailing list Help-grub@gnu.org https://lists.gnu.org/mailman/listinfo/help-grub