Grub Error Prefix Is Not Set
communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top What does error : “prefix” is not set and error: “prefix” not found means? up vote 2 down vote favorite 1 Before I disabled the ACPI (because it is not supported by Ubuntu) Ubuntu can't boot (obviously!) At that time when I boot Ubuntu, I always get these 2 messages. After 1 of those message shows, nothing shows up. error: "prefix" is not set error: "prefix" not found Although my problem is solved, I just want to know what these 2 messages mean in general, like what makes GRUB show this message. Espically the "prefix" part. boot prefix share|improve this question edited Aug 17 '12 at 23:56 Jorge Castro 24.4k91387589 asked Jun 26 '12 at 23:33 Emerson Hsieh 4,53852654 Impossible without further context. Include surrounding lines or take a photo of the screen and post it. –izx Jun 27 '12 at 12:38 No, that's the only line that appears. And the problem is fixed now so it is impossible to post any screenshot :( –Emerson Hsieh Jun 27 '12 at 15:25 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted According to bcbc (who is very knowledgeable about Wubi): The message about the 'prefix not being set' is innocuous (happens on every
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn http://superuser.com/questions/608962/grub2-booting-efidisk-read-error-prefix-is-not-set more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer http://forums.debian.net/viewtopic.php?t=81120 site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and grub error rise to the top GRUB2 booting: efidisk read error & prefix is not set up vote 1 down vote favorite everyone! I have a booting USB stick with some iso-image, based on Arch Linux. It loads through efi and then comes to Grub 1.99, where I can choose the iso images. I can load them without any problems, but before I see the menu of the Grub some error grub error prefix messages appear: error: "prefix" is not set error: efidisk read error USB stick is formatted in FAT32 and has a partition table msdos. Here is my /boot/grub/grub.cfg insmod video insmod font insmod jpeg insmod gfxterm set prefix=/boot/grub/grub.cfg loadfont /boot/grub/unicode.pf2 set gfxmode=auto terminal_output gfxterm background_image /boot/grub/background.jpg set default=0 set timeout=10 set menu_color_normal=white/black set menu_color_highlight=black/light-gray menuentry "image.iso" { set isofile="/images/image.iso" loopback loop $isofile set root=(loop) linux /isolinux/vmlinuz isofile=$isofile splash quiet initrd /isolinux/initrd } These settings works without any problems. At least, I can see my background image and the styles has been changed. I also checked from the Grub shell the parameters root=hd2,msdos1 //means that I have a correct path, otherwise actually it doesn't boot. I tried different versions of this prefix // /boot/grub/ // /boot/grub/grub.cfg // /efi/boot/ I would be glad to hear what can be the problem:) p.s. Was reading also that can be sth with GPT partition table, but in this case it doesn't boot with my computer. Thanks for helping. linux boot grub multi-boot grub2 share|improve this question edited Jun 18 '13 at 8:47 asked Jun 18 '13 at 7:50 Vladimir Tikhomirov 12618 add a comment| active oldest votes Know someone who can answer? Share a link to this question via email, Goo