I have to use pci=nocrs
with my hardware to get my USB ports to work. But because I have to use an external USB DVD drive, I have difficulty booting without passing that parameter.
I am able to edit the files on the disk before burning it, but it appears to all be pretty compressed and unreadable by a human. Are there any tricks or anything for editing grub boot parameters on a livecd like this? I'm using the Gnome 3 livecd (opensuse) if that matters.
The way I'm doing it on my Kubuntu install (not livecd) is this: GRUB_CMDLINE_LINUX="pci=nocrs"
and then running update-grub
.
I could probably do it "on-the-fly" each time I boot, but I'd like to avoid that. I'd also like to avoid installing it to the HDD (which, I know, would definitely solve my problem)
I am, however, open to making a new boot DVD if there's some way I could boot into the OS just once by manually (and temporarily) editing the parameter at boot time and then making the necessary changes from within the OS and then reauthoring the DVD based on the current image loaded in memory. (if there's any way to do that)
edit:
The /boot/grub
directory only has one file, and that's mbrid
. The contents of that file is only the following: 0x131f4e78
I'm guessing the filesystem is compressed into a single file which is uncompressed one piece at a time at runtime.
Also, here is the directory structure of the disk: (courtesy the TREE
command in DOS)
│ GNOME_3-read-only.x86_64-1.0.0
│ config.isoclient
│
└───boot
├───grub
│ mbrid
│
└───x86_64
└───loader
│ 08000600.spl
│ 10240768.spl
│ 12801024.spl
│ 16x16.fnt
│ af.hlp
│ af.tr
│ ar.hlp
│ ar.tr
│ back.jpg
│ bg.tr
│ bootlogo
│ ca.hlp
│ ca.tr
│ chain.c32
│ cs.hlp
│ cs.tr
│ da.hlp
│ da.tr
│ de.hlp
│ de.tr
│ el.hlp
│ el.tr
│ en.hlp
│ en.tlk
│ en.tr
│ es.hlp
│ es.tr
│ et.hlp
│ et.tr
│ fi.hlp
│ fi.tr
│ fr.hlp
│ fr.tr
│ gfxboot.c32
│ gfxboot.cfg
│ gl.tr
│ gu.hlp
│ gu.tr
│ hapysuse.mod
│ hi.tr
│ hr.hlp
│ hr.tr
│ hu.hlp
│ hu.tr
│ id.tr
│ initrd
│ isolinux.bin
│ isolinux.cfg
│ isolinux.msg
│ it.hlp
│ it.tr
│ ja.hlp
│ ja.tr
│ ka.tr
│ ko.hlp
│ ko.tr
│ kroete.dat
│ ky.hlp
│ ky.tr
│ linux
│ lt.hlp
│ lt.tr
│ mboot.c32
│ memtest
│ mr.hlp
│ mr.tr
│ nb.hlp
│ nb.tr
│ nl.hlp
│ nl.tr
│ pa.hlp
│ pa.tr
│ pabout.txt
│ panim.jpg
│ panim_a.jpg
│ pback.jpg
│ phead.jpg
│ pl.hlp
│ pl.tr
│ pt.hlp
│ pt.tr
│ pt_BR.hlp
│ pt_BR.tr
│ ro.hlp
│ ro.tr
│ ru.hlp
│ ru.tr
│ sk.hlp
│ sk.tr
│ sl.tr
│ sr.tr
│ sv.hlp
│ sv.tr
│ ta.tr
│ text.jpg
│ tg.tr
│ th.hlp
│ th.tr
│ timer_a.jpg
│ tr.tr
│ uk.hlp
│ uk.tr
│ wa.tr
│ welcome.jpg
│ xh.hlp
│ xh.tr
│ zh_CN.hlp
│ zh_CN.tr
│ zh_TW.hlp
│ zh_TW.tr
│ zu.tr
│
├───animations
└───branding
bootsplash-1024x768.cfg
bootsplash-1024x768.jpg
bootsplash-1280x1024.cfg
bootsplash-1280x1024.jpg
bootsplash-800x600.cfg
bootsplash-800x600.jpg
logo.mng
logov.mng
silent-1024x768.jpg
silent-1280x1024.jpg
silent-800x600.jpg
edit 2:
Here are the contents of /boot/x86_64/loader/isolinux.cfg
. This does, in fact, appear to be the correct place to put it. I will test it later tonight and update this to reflect the solution.
default GNOME3
implicit 1
display isolinux.msg
ui gfxboot bootlogo isolinux.msg
prompt 1
timeout 200
label GNOME3
kernel linux
append initrd=initrd ramdisk_size=512000 ramdisk_blocksize=4096 splash=silent showopts
label Failsafe_--_GNOME3
kernel linux
append initrd=initrd ramdisk_size=512000 ramdisk_blocksize=4096 splash=silent showopts ide=nodma apm=off acpi=off noresume selinux=0 nosmp noapic maxcpus=0 edd=off
label harddisk
localboot 0x80
label memtest
kernel memtest
It looks like I'll be able to add my parameter to the end of this: append initrd=initrd ramdisk_size=512000 ramdisk_blocksize=4096 splash=silent showopts