Hi Thomas, I try the solution from comment #39 erasing the five lines referring to grub_platform and it did not work.
Now I'm trying to do what you proposed on comment #45 being aware of comment #46 and, like it happened this morning when I first tried it, the output of -report_system_area is different to what you said. At morning, before your post realizing that the Ubuntu version of xorriso can't create an ISO with a GPT partition table, I was trying that and got the same output. I continued burning the iso to the usb drive but the boot delayed again. Then you mentioned the xorriso affair and I stopped the test. I return to the test now and I have the same output of the report_system_area command. In this case I stopped here because I think that is anything wrong and it is going to be unsuccessful again. I sumarize what I did (my working directory is $HOME/Impish_tests). I use absolute paths for avoiding possible errors. 1- Set the ORIG variable to $HOME/Impish_tests/ubuntu-21.04-desktop- amd64.iso ORIG=/home/jose/Impish_tests/ubuntu-21.04-desktop-amd64.iso 2- Set the NEW variable to $HOME/Impish_tests/ubuntu-21.04-test.iso NEW=/home/jose/Impish_tests/ubuntu-21.04-test.iso 3- Make a copy of the original iso (cp "$ORIG" "$NEW") 4- Set the STICK variable to /dev/sdd. My system assign this letter to the usb drive. I assume that the usb drive shoud have an original ubuntu 21.04 ISO burned. STICK=/dev/sdd 5- Set the FLAGSFILE variable to the file $HOME/Impish_tests/gnome_disk_flags.img FLAGSFILE=gnome_disk_flags.img 6- Extract 8 bytes of the working USB stick after the 1072 one and create the file referenced by $FLAGSFILE (this command shoud be issued with sudo). sudo dd if="$STICK" bs=1 skip=1072 count=8 of="$FLAGSFILE" 8+0 records in 8+0 records out 8 bytes copied, 0,00128856 s, 6,2 kB/s 7- Implant this 8 bytes after the first 1072 of the $NEW ISO file. dd if="$FLAGSFILE" conv=notrunc bs=1 seek=1072 count=8 of="$NEW" 8+0 records in 8+0 records out 8 bytes copied, 0,000311537 s, 25,7 kB/ 8- Verify that these 8 bytes into $NEW are now like in "$STICK". Here is the problem. The output is the following: ~/Impish_tests$ xorriso_dir/xorriso-1.5.4/xorriso/xorriso -indev stdio:"$NEW" -report_system_area plain | grep 'GPT partition flags:' GNU xorriso 1.5.4.pl02 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 908 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 1373661 * 2048 , 10040 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/home/jose/Impish_tests/ubuntu-21.04-test.iso' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 1376337 data blocks, 2688m data, 19.1g free Volume id : 'Ubuntu 21.04 amd64' GPT partition flags: 1 0x1000000000000001 --> But you said it must be GPT partition flags: 1 0x0000000000000005 GPT partition flags: 2 0x0000000000000000 GPT partition flags: 3 0x1000000000000001 But like you said on the comment <<Verify by xorriso -report_system_area of "$NEW" that the flags of partition 1 are now like in "$STICK">> So if I run the command with $STICK: ~/Impish_tests$ sudo xorriso_dir/xorriso-1.5.4/xorriso/xorriso -indev stdio:"$STICK" -report_system_area plain | grep 'GPT partition flags:' GNU xorriso 1.5.4.pl02 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 908 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 1373661 * 2048 , 10040 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdd' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 1376337 data blocks, 2688m data, 1173m free Volume id : 'Ubuntu 21.04 amd64' GPT partition flags: 1 0x1000000000000001 --> It is the same as $NEW, but ending in 1 instead of 5, like you said. GPT partition flags: 2 0x0000000000000000 GPT partition flags: 3 0x1000000000000001 At morning like I said before I did this test and, ignoring that the output of the last command did not match with yours, burn the $NEW ISO on the USB stick and it did not work. Now I get the same output and, before burning the $NEW ISO again, I ask you. Did I something wrong or that is OK but this solution will not work? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1922342 Title: HIrsute live session takes ages to boot on BIOS systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1922342/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
