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[bug #37331] GRUB 2 hangs when booting from USB drive on HP laptop DV7-6
From: |
Giuseppe Caizzone |
Subject: |
[bug #37331] GRUB 2 hangs when booting from USB drive on HP laptop DV7-6190 |
Date: |
Tue, 11 Sep 2012 15:18:06 +0000 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101 Firefox/15.0.1 |
URL:
<http://savannah.gnu.org/bugs/?37331>
Summary: GRUB 2 hangs when booting from USB drive on HP
laptop DV7-6190
Project: GNU GRUB
Submitted by: peppepz
Submitted on: mar 11 set 2012 15:18:05 GMT
Category: Booting
Severity: Major
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release:
Release: Bazaar - trunk
Reproducibility: None
Planned Release: None
_______________________________________________________
Details:
If I attempt to boot GRUB 2 on my laptop over a USB drive, GRUB hangs after
the "Welcome to GRUB!" message. Both GRUB 2.00 and Bazaar trunk behave in the
same way.
After it hangs, the PC fan spins up, and CTRL-ALT-DEL doesn't work.
This might be the same problem reported at comment #5 of this bug report:
https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=805747
The laptop is model DV7-6190, Sandy Bridge-based with 8 GB RAM and switchable
Ati/Intel graphics. Its BIOS is UEFI-based itself, but it only boots OSes in
legacy mode.
The problem seems to be related to the BIOS' "USB legacy support", because if
I boot GRUB from a CD, it works fine, and it can load Linux successfully. If I
boot GRUB from a CD while having a USB drive attached at power up, it still
works as long as I don't access the USB drive. For instance, if I type "ls" at
the GRUB prompt, it will hang.
I installed GRUB with --debug-image=all, and the messages I get before the
crash are:
| kern/disk.c:230: Opening 'hd0, msdos1' ...
| partmap/msdos.c: 181: partition 0: flag 0x80, type 0x7, start 0x800, len
0x12a18000
| Detecting ntfs ...
I tried renaming the i386-pc directory. This way, GRUB does start in rescue
mode without crashing, even when booted via USB. I then tried to manually
insmod some random modules. Some of them load, others crash the machine in the
usual way.
Working: adler32, crypto, extcmd, hexdump, search_fs_uuid, terminal, time
Crashing: hashsum, lsusb, lspci, mmap, normal, search, usb
Hexdumping the crashing modules' files does work, so GRUB is able to load them
before crashing.
Sometimes I also get this additional error message:
disk/i386/pc/biosdisk.c: 303: Read error when probing drive 0x82
but it doesn't crash the machine, and it doesn't always happen.
_______________________________________________________
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