| === JanC [n=janc@lugwv/member/JanC] has joined #ubuntu-boot | ||
| === makx [n=max@213.239.196.228] has joined #ubuntu-boot | ||
| === Keybuk [n=scott@descent.netsplit.com] has joined #ubuntu-boot | ||
| === fabbione [i=fabbione@gordian.fabbione.net] has joined #ubuntu-boot | ||
| === fabbione [i=fabbione@gordian.fabbione.net] has joined #ubuntu-boot | ||
| === fabbione [i=fabbione@gordian.fabbione.net] has joined #ubuntu-boot | ||
| fabbione | bah | 09:08 |
|---|---|---|
| fabbione | Keybuk: the patch I did for grub-installer fixes only half of the problems :/ | 09:08 |
| fabbione | i just figured that there is another section that needs love | 09:08 |
| Keybuk | oh? | 09:08 |
| fabbione | and it's WAYYYYYY complicate to touch | 09:08 |
| fabbione | the first patch fix the writing of the MBR | 09:09 |
| fabbione | and it works | 09:09 |
| fabbione | the issue is now all the references to groot/root/kopt | 09:09 |
| fabbione | that involves changing grub as well | 09:10 |
| fabbione | or update-grub | 09:10 |
| Keybuk | cute | 09:11 |
| === Keybuk backs away smiling | ||
| Keybuk | :D | 09:11 |
| fabbione | no | 09:11 |
| fabbione | painful | 09:11 |
| fabbione | grub is the shit | 09:38 |
| fabbione | it has the same code duplicated 3 times! | 09:38 |
| fabbione | Keybuk: you still around? | 09:47 |
| fabbione | nevermind ... i found | 09:50 |
| Keybuk | yup, just reading bugs | 09:53 |
| fabbione | Keybuk: i just noticed that my usb hd installation is showing a different symptoms from yesterday | 09:57 |
| fabbione | basically i can see initramfs that attempts to drop me to a shell | 09:58 |
| fabbione | at the same time the hd is recognized as sda | 09:58 |
| fabbione | and it deadlocks | 09:58 |
| fabbione | no shell | 09:58 |
| fabbione | no boot | 09:58 |
| fabbione | so i assume we are getting closer | 09:58 |
| Keybuk | interesting | 09:58 |
| fabbione | my temporary fix is to just run udevplug | 09:58 |
| fabbione | with no options | 09:58 |
| fabbione | and sleep a few secs for the device to be available | 09:58 |
| fabbione | but clearly is suboptimal | 09:59 |
| Keybuk | can you find out what device you actually need to be plugged? | 09:59 |
| Keybuk | walk /sys doing echo > .../uevent for each thing that exists until it works | 09:59 |
| fabbione | meh dude | 10:01 |
| fabbione | the problem is that the device is recognized later during the boot | 10:01 |
| fabbione | how can i do that in initramfs since it doesn't even drop me to a shell anymore? | 10:01 |
| Keybuk | break=premount | 10:07 |
| Keybuk | (on the kernel command line) | 10:07 |
| Keybuk | if a plain "udevplug" finds the device, then it means that my filter in the initramfs excludes it | 10:07 |
| Keybuk | so we need to find the device, and then add some detail (usually the PCI class) to the filter | 10:07 |
| fabbione | i think i know which one it is | 10:09 |
| fabbione | what i notice when i do udevplug manually | 10:09 |
| fabbione | is that i get the usb host controller module loaded | 10:10 |
| fabbione | do you actually load them? | 10:10 |
| fabbione | and if you can tell me what class it is i can easily test it | 10:10 |
| Keybuk | I should load them | 10:10 |
| fabbione | well i notice the message of "overcurrent from USB" | 10:11 |
| Keybuk | I load everything of class 0x0c* | 10:11 |
| fabbione | like if the device is initialized for the first time | 10:11 |
| fabbione | ok.. workrave is yelling at me.. brb | 10:11 |
| fabbione | re | 10:23 |
| fabbione | ahh | 10:59 |
| fabbione | Keybuk: i think i know what's wrong | 11:00 |
| fabbione | it might be a PEBCAK | 11:00 |
| fabbione | i am checking again now | 11:00 |
| fabbione | it's difficult to test this env cleanly | 11:00 |
| fabbione | Keybuk: i did check again.. i think there is race somewhere | 11:38 |
| fabbione | usplash is telling me that the system is waiting for root | 11:39 |
| fabbione | it drops me back that /dev/foo doesn't exists and wants to go to console | 11:39 |
| Keybuk | fabbione: interesting | 11:39 |
| fabbione | at the same time i see that the modules are loaded | 11:39 |
| Keybuk | drops you back after 30s or so? | 11:39 |
| fabbione | no, much faster than that | 11:39 |
| fabbione | it seems like it's happening outside the loop | 11:39 |
| Keybuk | weird | 11:40 |
| fabbione | i know, it takes something like 2 seconds to get there once Waiting for root appears | 11:40 |
| Keybuk | so it's dropping out of the loop? | 11:40 |
| fabbione | i guess so | 11:40 |
| Keybuk | that suggests the root device has appeared | 11:40 |
| fabbione | yes | 11:40 |
| fabbione | but it fails to mount it? | 11:40 |
| Keybuk | right | 11:40 |
| fabbione | the error is: "ALERT! /dev/sda1 doens't exists. Dropping to a shell!" | 11:41 |
| fabbione | but i never get to the shell | 11:41 |
| fabbione | even waiting forever | 11:41 |
| fabbione | and after that message i see that sda did appear | 11:41 |
| Keybuk | ok ... | 11:44 |
| Keybuk | kooky | 11:44 |
| Keybuk | are you using root=/dev/sda1 ? | 11:44 |
| fabbione | yes | 11:44 |
| Keybuk | does /dev/sda1 exist? | 11:45 |
| fabbione | after the modprobing yes | 11:45 |
| fabbione | http://people.ubuntu.com/~fabbione/grub.diff | 11:45 |
| Keybuk | huh? | 11:45 |
| Keybuk | right | 11:45 |
| Keybuk | so you get Waiting for root filesystem | 11:45 |
| Keybuk | after 2s you get "/dev/sda1 doesn't exist" | 11:46 |
| Keybuk | at the point you're dropped to a shell | 11:46 |
| Keybuk | and /dev/sda1 doesn't exist | 11:46 |
| Keybuk | if you modprobe <something> then it exists? | 11:46 |
| fabbione | i can't modprobe anything | 11:46 |
| fabbione | the shell is not there | 11:46 |
| fabbione | even it tells me that's dropping to a shell | 11:46 |
| Keybuk | is the shell on a different vt? | 11:46 |
| fabbione | nope | 11:46 |
| fabbione | already checked | 11:46 |
| Keybuk | (I assume you're doing this without "splash" in the kernel command line?) | 11:46 |
| fabbione | ah yes | 11:47 |
| fabbione | if i type exit at the shell, it just works | 11:47 |
| Keybuk | at what shell?! | 11:47 |
| fabbione | because the device is there | 11:47 |
| Keybuk | you just said you didn't have a shell | 11:47 |
| fabbione | i was wrong | 11:47 |
| Keybuk | oh | 11:47 |
| fabbione | it was on alt+f8 | 11:47 |
| Keybuk | heh | 11:47 |
| fabbione | i did stop at alt+f6 | 11:47 |
| Keybuk | ok... | 11:48 |
| fabbione | YOU ALL HATE ME YOU BASTARDS! | 11:48 |
| Keybuk | so do that again | 11:48 |
| Keybuk | take out splash and quiet | 11:48 |
| fabbione | you are driving me insate | 11:48 |
| fabbione | insane | 11:48 |
| Keybuk | and tell me exactly what you see for each part of the boot | 11:48 |
| Keybuk | how long it waits | 11:48 |
| Keybuk | etc. | 11:48 |
| fabbione | ok | 11:48 |
| fabbione | gimme a few.. it takes long to boot that stuff | 11:48 |
| fabbione | ok | 11:52 |
| fabbione | this is what i see: | 11:52 |
| fabbione | Waiting for root | 11:52 |
| fabbione | done | 11:52 |
| fabbione | Mounting root f | 11:53 |
| fabbione | Running local-top | 11:53 |
| fabbione | done | 11:53 |
| fabbione | ALERT! /dev/sda1...blabla shell! | 11:53 |
| Keybuk | right | 11:53 |
| fabbione | i get the shell in busy box | 11:53 |
| Keybuk | how long does it wait after "Waiting for root" ? | 11:53 |
| fabbione | probably 2 seconds | 11:53 |
| Keybuk | oh meh | 11:53 |
| Keybuk | I see the bug | 11:53 |
| Keybuk | I dropped a "0" | 11:53 |
| fabbione | as soon as I enter the busybox | 11:54 |
| Keybuk | must have done that by accident when I stopped usplash from timing out | 11:54 |
| fabbione | i see the messages from the kernel that sda is appearing | 11:54 |
| fabbione | ok | 11:54 |
| fabbione | good | 11:54 |
| === fabbione uploads the last grub bits to make this spec a reality | ||
| fabbione | Keybuk: do you want me to test a patch before you upload? | 11:55 |
| fabbione | i can do that easily | 11:55 |
| fabbione | it just takes a few minutes to reboot the thingy :) | 11:56 |
| Keybuk | change the slumber=30 line to 300 in the udev initramfs premount hook | 11:56 |
| Keybuk | /usr/share/initramfs-tools/scripts/init-premount/udev | 11:57 |
| Keybuk | and update-initramfs -u | 11:57 |
| fabbione | testing | 11:58 |
| fabbione | Keybuk: score | 12:04 |
| fabbione | but i need to lart you for uploading glibc! | 12:05 |
| Keybuk | why? | 12:10 |
| fabbione | i was almost at the end of the build on sparc :P | 12:10 |
| === fabbione starts again | ||
| Keybuk | lol | 12:12 |
| fabbione | well it's all ccached | 12:13 |
| fabbione | it won't take ages | 12:13 |
| Mithrandir | Keybuk: I don't see any /dev/disk/by-* in the initramfs, is that intentional? | 01:04 |
| fabbione | if that's intentional, we can't implement prob-for-root :) | 01:15 |
| Mithrandir | sure we can | 01:17 |
| Mithrandir | I have persistent live cds almost working already. | 01:18 |
| fabbione | Mithrandir: no wwithout disk-by-uuid | 01:28 |
| === jbailey [n=jbailey@modemcable139.249-203-24.mc.videotron.ca] has joined #ubuntu-boot | ||
| === mgalvin [n=mgalvin@ubuntu/member/mgalvin] has joined #ubuntu-boot | ||
| Keybuk | Mithrandir: kinda | 03:22 |
| Keybuk | it's more that there's nothing unneeded in the initramfs | 03:22 |
| Keybuk | when we come to need those, we'll add them | 03:22 |
| Keybuk | is just a matter of copying the rules and helpers | 03:22 |
| Mithrandir | Keybuk: apparently, the rule is there already | 03:22 |
| Keybuk | it is? | 03:23 |
| Keybuk | hmm | 03:23 |
| Keybuk | wonder why they don't work then | 03:23 |
| Mithrandir | also, how can I wait until usb hotplugging is done? | 03:25 |
| Mithrandir | Keybuk: ^^ | 03:31 |
| Keybuk | define "done" | 03:32 |
| Mithrandir | when the nodes are in /dev and accessing them will yield a sensible result. | 03:32 |
| Keybuk | while [ ! -e $NODE ] ; do | 03:32 |
| Keybuk | sleep 1 | 03:32 |
| Keybuk | done | 03:32 |
| Keybuk | pretty much like the udev init-remount script does for scsi/usb/ieee1394/etc. devices | 03:33 |
| Mithrandir | well, it might never appear. :-) | 03:33 |
| Keybuk | yeh | 03:33 |
| Mithrandir | I want to use a block device with a specified label as the backend storage for casper | 03:33 |
| Keybuk | the kernel guys take on this is that you should do it in a udev event or something | 03:33 |
| Mithrandir | but if it's not there, I'll use a tmpfs | 03:34 |
| Keybuk | they refuse to add any kind of "I've finished scanning the bus" notification | 03:34 |
| Keybuk | to either USB, SCSI, SATA, etc. | 03:34 |
| Mithrandir | so there's no way to accomodate my use case? | 03:35 |
| Mithrandir | I obviously don't want to just sleep five seconds and see if anything comes by. | 03:37 |
| Keybuk | does that existing affect what you'd ordinarily do next? | 03:40 |
| Mithrandir | yes. | 03:41 |
| Keybuk | then yeah, no easy way | 03:41 |
| Mithrandir | since if a device with a given label exists, I'll mount that. If not, I'll mount something else. | 03:41 |
| Mithrandir | then, I'll mount the cd and unionfs mount those together. | 03:41 |
| Mithrandir | can I do something like udevplug -Busb, or won't that give me what I think it might? | 03:44 |
| Keybuk | won't do what you think | 03:45 |
| Keybuk | that will wait for anything already known to be on the USB bus to be configured | 03:45 |
| Keybuk | it won't find new things on the bus | 03:45 |
| Mithrandir | I'm not too worried about the use-case of somebody plugging it in halfway | 03:46 |
| Mithrandir | so if I can just say "please plug any USB and tell me when you're done", that's fine. | 03:47 |
| Keybuk | right, but USB isn't instant | 03:47 |
| Keybuk | in theeeeeory | 03:47 |
| Keybuk | if you run after the udev init-premount script, then any USB devices the kernel knows about are there, or not there | 03:48 |
| Keybuk | but if you have a slow USB hub or controller somewhere, you're racing it | 03:48 |
| Mithrandir | it might be that the device hasn't settled yet as well? | 03:49 |
| Keybuk | indeed | 03:50 |
| Mithrandir | this situation really sucks. | 03:51 |
| Mithrandir | I guess the /sys entries aren't there either? | 03:57 |
| Keybuk | exactly | 04:00 |
| Keybuk | the kernel pov is that if the device hasn't settled, then how's the kernel supposed to know it's there? | 04:00 |
| Keybuk | the kernel does a USB scan, and announces the devices as and when they report back | 04:00 |
| Keybuk | if they wanted to add a "finished!" thing, they'd have to sleep-and-loop-and-timeout | 04:01 |
| Keybuk | which is the kind of thing that belongs in userspace | 04:01 |
| Mithrandir | so I can say "please scan the USB bus" and then sleep for a couple of seconds, then look in /sys/block and it should be ok-ish? | 04:02 |
| Keybuk | yeah | 04:02 |
| Mithrandir | and udevplug -Busb does the first part? | 04:02 |
| Keybuk | no | 04:03 |
| Keybuk | udevplug is a cold-plugging tool, it's for catching up on missed kernel events | 04:03 |
| Keybuk | udev already takes care of the -Busb thing | 04:03 |
| Mithrandir | so I can just sleep five seconds or something and scan, then? | 04:04 |
| Keybuk | I assume you're running after the udev init-premount script? | 04:05 |
| Mithrandir | yeah, this is a replacement for /scripts/local | 04:05 |
| Keybuk | right | 04:05 |
| Keybuk | you may be able to just look for the device straight away | 04:06 |
| Keybuk | the time taken to get there should be enough for the device to show up | 04:06 |
| Keybuk | and udevd will handle making the device node for you in the background | 04:06 |
| Mithrandir | doesn't appear to be on my system | 04:06 |
| Keybuk | does it appear if you sit and wait for a few seconds? | 04:06 |
| Mithrandir | let me check with break=premount | 04:07 |
| Keybuk | break=mount would maybe be better ;) | 04:07 |
| Mithrandir | well, yes. | 04:07 |
| Mithrandir | :-) | 04:07 |
| Mithrandir | "Spawning shell..\n", then messages about sdb (which is the usb memory stick in question here) | 04:08 |
| Keybuk | "the red car and the blue car had a race" | 04:10 |
| Mithrandir | the blue is consistently winning on my system, though. | 04:10 |
| Keybuk | that's because smart ol' Blue chose the Milky Way | 04:11 |
| Mithrandir | ok, that works now. | 04:39 |
| Mithrandir | huzza! Working live cd persistency. | 04:57 |
| === fabbione [i=fabbione@gordian.fabbione.net] has joined #ubuntu-boot | ||
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