[Dapper] Wrong disc enumeration when installing (or updating from Breezy)

[Fnx]

Hello,

I am reporting a bug encounter for both new installation from the Dapper 6.06 liveCD and (dist-) upgrading from a fully functionnal Breezy install.
After upgrade, the computer is unable to start again. It boots but the system crash during mount of the local partitions.

My system (Athlon XP [686] on a Asus Abit NF-7S motherboard) has three hard drives connected through an inboard IDE controller and a PCI Silicon Graphic 680 IDE controller.
Before installation and for other linux distro the disc enumeration is as follow
Grub Dapper Disk
hd0 /dev/hda WD (onboard IDE0)
hd1 /dev/hde Maxtor (PCI Sil680 IDE0)
hd2 /dev/hdg IBM (PCI Sil680 IDE1)
             /dev/hdc DVD Drive (onboard IDE1)

For Dapper 6.06, my system is recognize as follow
Grub Dapper Disk
hd0 /dev/hde WD (onboard IDE0)
hd1 /dev/hda Maxtor (PCI Sil680 IDE0)
hd2 /dev/hdc IBM (PCI Sil680 IDE1)
             /dev/hdg DVD Drive (onboard IDE1)

Firstly, I strongly suspected a grub error, but by checking the partitions numbers for each disk, I managed to check that before the start of the linux kernel, grub detects the disk in the correct order (as listed above).
The file /boot/grub/device.map looks also correct (Breezy after Dapper update)
(fd0) /dev/fd0
(hd0) /dev/hda
(hd1) /dev/hde
(hd2) /dev/hdg

For me this problem is critical, since it prevent Dapper to start.
It might be also a security issue, since during linux start, other partitions not linked with ubuntu are mistakaly mounted and data could be erased or altered.

NB: I think this bug is related with Bug #6367 and Bug #40993.

[Martin Pitt (pitti)]

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