| CIA-37 | debian-installer: cjwatson * r1479 ubuntu/debian/changelog: releasing version 20101020ubuntu40 | 09:33 |
|---|---|---|
| maxb | Hrm. It looks like grub-probe assumes the incorrect path for any md devices created during the natty installer, causing the grub-install call to fail | 19:50 |
| CarlFK | if my netboot installer append has BOOTIF=01-00-14-22-94-06-6a should I also need netcfg/choose_inter | 20:32 |
| CarlFK | face=eth0 ? | 20:32 |
| v12 | hi, i'm having trouble using the alternate installer from USB. i have grub installed and launch the installer from USB via loopback. it fails with "searching for Ubuntu installation", and more specifically "cdrom mount failed". i do not have a boot=... parameter in the kernel line. how do i tell the installer where its root is? | 22:35 |
| v12 | or, put another way, what is the appropriate boot=... directory for the alternate installer? | 22:36 |
| v12 | topic points to 404 webpage (~scott). bad sign... | 22:39 |
| cjwatson | CarlFK: nope, the default (=auto) should do | 22:55 |
| cjwatson | hm, that link is definitely stale - it was for performance measurements | 22:55 |
| CarlFK | cjwatson: on a dell laptop whos wifi shows up as eth0, the default gave me "pick an interface" | 22:56 |
| cjwatson | CarlFK: oh, right, it won't be marked as seen. use netcfg/choose_interface=auto then | 22:56 |
| === cjwatson changed the topic of #ubuntu-installer to: Don't ask to ask, just ask (and stick around, we aren't all here 24/7) | Please include installer syslog with problem reports | http://wiki.ubuntu.com/Installer/FAQ | Development of d-i and ubiquity in Ubuntu | http://wiki.ubuntu.com/Installer/Development | If nobody answers, try ubuntu-installer@lists.ubuntu.com | ||
| cjwatson | v12: you should definitely never need to tell the installer where its root is by hand | 22:57 |
| CarlFK | cjwatson: ah, got it. thanks. was thinking there was a bug. will try auto, that sounds sane. | 22:57 |
| cjwatson | v12: that's sufficiently so that I'm not even sure how one might tell it ... | 22:57 |
| cjwatson | I don't believe we pass root= normally | 22:58 |
| cjwatson | boot= is nonexistent AFAI | 22:58 |
| cjwatson | K | 22:58 |
| CarlFK | cjwatson: you mind looking at bug 728710 - this has been annoying me for a few releases. just now got to reporting it but it seems to be slipping into a crack. | 22:58 |
| ubot2 | Launchpad bug 728710 in debian-installer "d-i apt-setup/local0/repository not working" [Undecided,New] https://launchpad.net/bugs/728710 | 22:58 |
| cjwatson | CarlFK: ask me when I haven't just got back from the pub :) | 22:59 |
| cjwatson | v12: what version of Ubuntu is this? | 22:59 |
| CarlFK | roger that :) | 22:59 |
| cjwatson | v12: if it's earlier than natty, cdrom-detect/try-usb=true might help | 23:00 |
| v12 | cjwatson: it's Natty. i omitted "auto" i'll try that | 23:00 |
| v12 | is there somewhere i can check for the "auto" logic? i'm not sure where to browse the source | 23:01 |
| cjwatson | v12: the auto bit wasn't directed at you | 23:01 |
| cjwatson | and won't help you | 23:01 |
| v12 | ahh | 23:01 |
| cjwatson | CarlFK: the snippets of syslog you've posted there aren't very useful - they just describe the bit where d-i is processing the preseed file into the debconf database, not the bit much later on when it actually tries to use them. could you attach a full DEBCONF_DEBUG=developer syslog? | 23:02 |
| v12 | does the iso need to be in a root directory? mine is in /boot/isos/natty.iso | 23:02 |
| CarlFK | cjwatson: will do | 23:02 |
| cjwatson | v12: let me check | 23:03 |
| cjwatson | v12: oh, you're doing it that way? you actually need something a bit different | 23:03 |
| * cjwatson hunts down the doc link | 23:03 | |
| cjwatson | https://help.ubuntu.com/11.04/installation-guide/i386/boot-usb-files.html | 23:05 |
| lifeless | cjwatson: oh hai | 23:06 |
| cjwatson | you can set up a similar boot entry with grub of course, although that describes syslinux | 23:06 |
| lifeless | cjwatson: could I grab a couple of tips about grub2 & dmraid ? | 23:06 |
| cjwatson | I suspect the standard loopback.cfg bits may only work properly with the desktop cd | 23:06 |
| cjwatson | lifeless: maybe, see above comment about just being back from pub | 23:06 |
| lifeless | cjwatson: heh; I am doing nose following, I hopefully just need broad advice | 23:07 |
| lifeless | cjwatson: I've filed a bug 803658 about this. the tl;dr version is: | 23:07 |
| ubot2 | Launchpad bug 803658 in grub2 "grub-install /dev/mapper/isw_$UUID_$NAME0 failing with ICH10R raid 1+0" [Undecided,New] https://launchpad.net/bugs/803658 | 23:07 |
| lifeless | dmraid 1+0 (striped layered on mirrored) | 23:07 |
| lifeless | grub-probe errors out 'cannot find a grub drive for ...' | 23:08 |
| cjwatson | what's the device.map look like? | 23:08 |
| cjwatson | if you have one | 23:08 |
| lifeless | inside the target? | 23:08 |
| cjwatson | /boot/grub/device.map in whatever filesystem namespace grub-install is running in, yes | 23:08 |
| lifeless | no such file | 23:09 |
| cjwatson | ok, failure to autodetect is a bad sign, but two things | 23:09 |
| lifeless | cjwatson: I wanted to check my understanding, which is that grub will happily read the bios provided mapped array at boot, and that its just a logic failure figuring this out in the prober | 23:10 |
| cjwatson | (a) figure out what grub-probe command is being run (sh -x /usr/sbin/grub-install <args>, check somewhere near the end), run it with -vv and attach output to bug | 23:10 |
| v12 | cjwatson: says nothing about how to tell the iso not to worry about the CD. i am already booting the kernel in /install.amd/vmlinuz | 23:10 |
| v12 | whoops i mean /install/ | 23:11 |
| cjwatson | (b) you may be able to work around this by creating /boot/grub/device.map (grub-mkdevicemap can create a skeleton); an entry in device.map constitutes a promise that the BIOS can read from that drive | 23:11 |
| cjwatson | v12: those directions instruct you to use a different build of the installer which has different logic in this area | 23:11 |
| v12 | unfortunately i am trying to use efi | 23:11 |
| cjwatson | that shouldn't particularly matter | 23:12 |
| cjwatson | you'll have to translate the boot instructions into grub-speak, certainly, since syslinux won't work | 23:12 |
| cjwatson | lifeless: yes, at boot time grub should be able to read from anything that the BIOS INT 13h facilities provide | 23:13 |
| lifeless | cjwatson: attached | 23:13 |
| lifeless | cjwatson: perhaps grub2 has the same broken filtering that parted does for raid 1+0 | 23:14 |
| cjwatson | it won't be the same as such, but may produce similar results; I agree it's a logic failure in grub-probe | 23:14 |
| cjwatson | in general we need to probe the root device in order to figure out which modules to build into the core image | 23:15 |
| lifeless | the probe seems to entirely ignore the array0 device (dm-2) | 23:16 |
| cjwatson | I *think* an explicit device.map entry should work around this; it doesn't particularly matter what you call it, I'd just use (hdN) where N is one greater than the last entry in what grub-mkdevicemap produces | 23:17 |
| v12 | cjwatson: how does the alternate installer get used for USB? has anyone done it before? | 23:18 |
| cjwatson | v12: follow the directions I provided, using the hd-media image | 23:19 |
| cjwatson | or else, it should be possible to boot the alternate installer by running isohybrid on the ISO and then writing it directly to the entire USB disk | 23:19 |
| cjwatson | (whether that will work on EFI I don't recall) | 23:19 |
| lifeless | cjwatson: it still errors on probe | 23:19 |
| lifeless | same error | 23:20 |
| v12 | aha i'll look for the hd-media image... | 23:20 |
| cjwatson | lifeless: exactly what line did you put in device.map? | 23:20 |
| lifeless | I'll paste to the bug (not ircing from that machine) | 23:21 |
| lifeless | cjwatson: is there now | 23:22 |
| cjwatson | we certainly seem to need logic in find_partition_start for striped devices | 23:22 |
| cjwatson | lifeless: if you could attach the output of 'dmsetup table' as well, I can probably attack this tomorrow; I'm afraid it requires a greater level of alertness than I possess right now | 23:24 |
| lifeless | attached. | 23:24 |
| lifeless | I'll poke around a bit | 23:25 |
| lifeless | thanks! | 23:25 |
| cjwatson | this is partly arising from the need to map partitions onto their offsets from the start of the disk | 23:25 |
| lifeless | the partition table isn't accurate? | 23:26 |
| cjwatson | it is, but we do this in order to be able to map partition devices onto their containing disk devices | 23:26 |
| cjwatson | which is actually startlingly difficult to do in the general case | 23:26 |
| lifeless | cjwatson: I can imagine - in the striped case it seems impossible to me | 23:26 |
| cjwatson | shouldn't be, we can get all the links from device-mapper's table | 23:26 |
| lifeless | cjwatson: doesn't htat imply grub having to reimplement the stripe logic? | 23:27 |
| cjwatson | since the "containing disk" that we care about is the striped device, not either mirrored device | 23:27 |
| cjwatson | I don't think so, at least not much, but I'll have to look tomorrow | 23:27 |
| lifeless | cjwatson: I'm probably misunderstanding the direction of containing there ;) | 23:27 |
| lifeless | but its late for you | 23:27 |
| cjwatson | yeah, I don't think I'm being very clear | 23:28 |
| cjwatson | anyway, bed :) | 23:28 |
| lifeless | I'll see if I can wipe my disk out at least twice before lunch | 23:28 |
| cjwatson | sorry not to be able to solve immediately | 23:28 |
| lifeless | de nada | 23:28 |
| lifeless | now if I can just remember how to get debian/patches applied | 23:28 |
| cjwatson | I don't think I've seen the striped case before. might need to set something up in a vm | 23:28 |
| lifeless | to build normally | 23:28 |
| cjwatson | debian/rules patch | 23:28 |
| cjwatson | in the case of grub2 | 23:28 |
| lifeless | thanks! | 23:28 |
| cjwatson | (which 'debian/rules build' does for you, but 'debian/rules build/grub-pc' doesn't - that's a bug) | 23:29 |
| CarlFK | cjwatson: thanks for =auto. worked as advertised | 23:30 |
| cjwatson | CarlFK: oh good | 23:37 |
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