Bug 470471 - Plymouth don't show errors during boot
Plymouth don't show errors during boot
Product: Fedora
Classification: Fedora
Component: plymouth (Show other bugs)
x86_64 Linux
medium Severity medium
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Assigned To: Ray Strode [halfline]
Fedora Extras Quality Assurance
: Reopened, Triaged
Depends On:
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Reported: 2008-11-07 06:27 EST by Martin Klapetek
Modified: 2009-12-18 01:46 EST (History)
6 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2009-12-18 01:46:32 EST
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Description Martin Klapetek 2008-11-07 06:27:21 EST
Description of problem:
Sometimes my powernow_k8 module fails to start (caught signal 11) and the plymouth stops animating, but I have no idea it happened, the only clue that something is wrong is the stopped animation

Version-Release number of selected component (if applicable):

How reproducible:
Always when there's an error during boot

Steps to Reproduce:
1. Hard to tell howto reproduce, my powernow_k8 module mostly fails if I shut down the notebook with holding the power button instead of normal power off. Then it always fails to load the powernow_k8

Actual results:
Plymouth stops animating, the progressbar stops and the user has no idea of what's going on. I can press the Esc and see what happened, but I think the user should be notified of this

Expected results:
Notify the user that something went wrong during boot

Additional info:
Happens on Fedora 10 Preview x86_64 on hp Pavilion tx2500 tablet-pc
Comment 1 Ray Strode [halfline] 2008-11-07 10:03:18 EST
I don't know much about powernow_k8.

Is it a kernel module that's oopsing?  You say it caught signal 11, which makes me think it's a userspace program.  When it crashes boot up doesn't continue?  Is it loaded in the initrd?

Can you tell me what it says when you press escape?
Comment 2 Martin Klapetek 2008-11-07 11:31:46 EST
Yeah, it's a kernel module for managing cpu power consumption (I guess). Now I realized, I made a small mistake in the initial problem description (I was submitting two plymouth bugs and I swapped some details). Actually the animation does not stop, it goes on forever, the progress bar reaches it's end and stops there, but the animation still continues. 

Anyway, when it crashes, the boot doesn't continue. Only the plymouth animation continues. I guess it's loaded by the initrd although I'm not sure (how can I tell?).

It says exactly this (it may be little bit messed-up as I have czech l10n and I'm translating the output from czech...):

Begging non-interactive startup
/etc/rc5.d/S06cpuspeed: line 112: 1838 Unauthorized memory access (SIGSEGV)    /sbin/modprobe powernow-k8 2>/dev/null

The interesting thing is, that when it happens and I press escape to see it, then if I press ctrl+alt+delete it goes straight to the kdm screen, but neither the keyboard nor mouse works, so I can only shut it down manually using the power button.
Comment 3 Ray Strode [halfline] 2008-11-10 15:24:13 EST
seems like upstart is getting hosed somehow.  (ctrl-alt-delete is causing upstart to wake up from its trance)
Comment 4 Bill Nottingham 2008-11-10 15:35:09 EST
So, what's likely to be happening here is:

modprobe segfaults/oopses. It's entirely possible at this point the init script is hung in the kernel.

ctrl-alt-del wakes up upstart; since the first thing it does is 'stop' the currently running runlevel start, prefdm may start. However, it's also switching to runlevel 6 to reboot.

Since you've oopsed, it's unlikely you'll be able to reboot cleanly. So, you have to hard poweroff.

In the meantime, assigning to the kernel for the crash. If you can reproduce the error, I'd remove 'rhgb quiet' from the boot parameters, and see if you can get actual output from the kernel.
Comment 5 Martin Klapetek 2008-11-10 15:46:07 EST
(In reply to comment #4)
> In the meantime, assigning to the kernel for the crash. If you can reproduce
> the error, I'd remove 'rhgb quiet' from the boot parameters, and see if you can
> get actual output from the kernel.

No need to, this kernel bug is reported separately (see #470551). I reported this because the plymouth doesn't show that something has happened and keeps animating forever, which isn't good.
Comment 6 Bill Nottingham 2008-11-10 15:52:45 EST
Unfortunately, there's not really a good mechanism for plymouth to detect 'stuck', if it's truly hanging forever.
Comment 7 Casey Dahlin 2008-11-10 15:57:34 EST
rhgb used to revert to the detailed view if it hadn't detected some sort of activity in a certain period of time (and would go back to graphical if the user didn't interact).
Comment 8 Ray Strode [halfline] 2008-11-10 16:21:06 EST
yea, we had to disable that feature in rhgb.  There's no timeout that's reasonable for all systems.
Comment 9 Ray Strode [halfline] 2008-11-10 16:24:50 EST
hmm, thinking about this more, we might be able to detect oopses...  Probably won't be able to detect panics, but that should get solved by the kernel when it sends panics over the framebuffer.
Comment 10 Ray Strode [halfline] 2008-11-11 11:12:20 EST
*** Bug 470468 has been marked as a duplicate of this bug. ***
Comment 11 Martin Klapetek 2008-11-11 11:32:59 EST
Okay, I'm just adding the info from the bug marked as a dupe of this one as they are considered related. The other bug is about crashing X and plymouth not reacting to it. When there's an error in the xorg.conf file, which forces the X to crash, the plymouth just keeps running, although the animations are stopped. I guess the plymouth should show some info about unsuccessful X start, maybe show the X output (the log) on the screen or something, but definitely not keep the plymouth screen as nothing happened. And I'm sure the X tried to start, cause there's a log created from the crash.
Comment 12 Bug Zapper 2008-11-25 23:57:49 EST
This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle.
Changing version to '10'.

More information and reason for this action is here:
Comment 13 John J. McDonough 2009-07-05 08:57:09 EDT
Even non-errors are a problem.

When a file system check is neeed, on todays large drives it can take a very long time.  When the normal <a minute boot starts to take 5 or 10 minutes, the assumption is that it is hung.  There is no clue that there is something "normal" happening.  Pressing the reset button results in the same behavior.  Selecting another kernel version results in the same behavior, until one waits long enough for the check to complete, which might take a very long time on a partition that is a significant fraction of a terabyte.

Not only is some error notification needed, simply uncommon events need notification.
Comment 14 Bug Zapper 2009-11-18 03:47:00 EST
This message is a reminder that Fedora 10 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
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Comment 15 Bug Zapper 2009-12-18 01:46:32 EST
Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
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