Hi Vladimir thank you for your response, I managed to follow this guide from start to end, and i have a bootable USB flash drive with grub and also with the ubuntu.iso in it, just like you explained. tutorial: https://www.pendrivelinux.com/install-grub2-on-usb-from-ubuntu-linux/
*Inside my usb flash drive, the contents on the boot/grub/grub.cfg are*: *--------------* *# This Menu entry brought to you courtesy of https://www.pendrivelinux.com/install-grub2-on-usb-from-ubuntu-linux/ <https://www.pendrivelinux.com/install-grub2-on-usb-from-ubuntu-linux/>set timeout=10set default=0menuentry "Run Ubuntu Live ISO" { loopback loop /ubuntu.iso linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/ubuntu.iso splash -- initrd (loop)/casper/initrd}* *--------------* Now my quesiton is, where should i add this line?: *memmap=8K\\\$0x00000005A00C000,4K\\\$0x00000005A00E000,8K\\\$0x00000005C00C000,4K\\\$0x00000005C00E000* That line above is the fix for my memory in grub.cfg but i don´t know where to put it. On a pc where linux has already been installed into the hard drive, the line would look something similar to this: *GRUB_CMDLINE_LINUX_DEFAULT="quiet splash memmap=8K\\\$0x00000005A00C000,4K\\\$0x00000005A00E000,8K\\\$0x00000005C00C000,4K\\\$0x00000005C00E000"* *But on bootable live flashdrive in boot/grub/grub.cfg im not sure how i am supposed to add it.* *do you know?* *thanks* On Sun, Nov 6, 2022 at 6:09 PM Vladimir 'phcoder' Serbinenko < phco...@gmail.com> wrote: > Thank you a lot for this feedback. For LiveUSB: put original iso as a > file then install GRUB on the USB and put in boot/grub/grub.cfg: > memmap ... > > menuentry "My Live USB" { > iso_path=<My ISO> > export iso_path > loopback loop $iso_path > root=loop > configfile /boog/grub/loopback.cfg > } > > The config is of the top of my head, might need some corrections. If > so please let me know and post them back for others > > On Sun, Nov 6, 2022 at 9:58 PM James Wabi <imitomx1...@gmail.com> wrote: > > > > Hi. > > > > Thanks you all developers that workd on Grub. With grub and the Badram > and Memmap command i was able to fix my Laptop with bad/broken soldered ram > memory in the motherboard. > > Actually "memmap" was the one that worked, which reserved specific > memory address making the OS bootable and stable. > > > > The catch was to install linux on a good working PC and edit the cfg > /etc/default/grub to include some specific memmap lines for the memory > addresses that needed to be blocked, then transfer the hard drive to the > broken memory laptop. This fixed everything. and the laptop has been > running perfectly. > > > > I have not found a way, and there is no information online, if this is > possible to do with a LIVE linux USB flash drive. As soon as you boot from > a live USB flashdrive, the machine starts to use bad broken soldered > memory. And i wish there was a way to edit the live usb boot flash drive so > it has edited GRUB memmap commands in order to boot with the USB live > linux and blocking that memory address. > > > > I have read i should prepare the live-usb flashdrive with rufus, but the > files are completely different from what you do with a linux that is > already installed on a hard drive and changing /etc/default/grub cfg > > > > If this can be done in the future it would really help, to most of us > that have bad soldered memory on the motherboard. Would be nice to live > boot a linux and block some memory addresses. > > > > thanks! > > > > > > _______________________________________________ > > Grub-devel mailing list > > Grub-devel@gnu.org > > https://lists.gnu.org/mailman/listinfo/grub-devel > > > > -- > Regards > Vladimir 'phcoder' Serbinenko > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel >
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