Bug 498117

This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle.
Changing version to '11'.

More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

This bug seems to get around, most recently masquerading as a SATA driver problem in #514124 against F11 release, and as boot hangs during udev in #521004 against F12 rawhide. Both of these are worked around by blacklisting snd_hda_intel, which suggests kernel memory corruption by that driver or one of its co-requisites.

I've essentially replicated this bug with the Fedora 11 x96_64 LIVE release CD.
The problems go away when sound is disabled in BIOS. But before then: 

A. After removing rhgb and queit, and either adding nomodeset or not, the boot proceeds to 
Starting udev...
/bin/mknod '/dev/loop0' : File exists
...
/bin/mknod '/dev/loop7' : File exists [OK]
Setting hostname localhost.localdomain
(Hangs with hdd activity light lit.
hardware reset


B. Adding modprobedebug to boot flags shows
1. all acpi drivers load
2. all sound drivers load, last being snd_hda_intel
3. udev_event[*] exec failed of program /sbin/alsactl
4. Checking filesystems:
   /etc/rc.d/rc.sysinit: line 568 /sbin/fsck Input Output error
   /etc/rc.d/rc.sysinit: line 587 /bin/plymouth Input Output error
   /etc/init.d/functions: line 494 /usr/bin/plymout Input Output error
   *** An error occurred during filesystem checks
   *** Dropping yuou to a shell
   sulogin: error while reading shared libraries: /lib64/libfreebl3.so: cannot read file data: Input Output error
   Unmounting filesytems
   Automiatic reboot in progress
   (hangs, hdd light NOT lit)
hardware reset

C. Disable sound in BIOS and reboot. Fedora 11 x86_64 LIVE CD appears to boot and run fine with NO changes to boot flags, i.e leaving KMS enabled.
   "Computer" widget shows all SATA and IDE filesystems, but not md raids.
   Firefox comes up, network auto initialized without prompting.
   gnome-display-properties does not configure spanning displays on my dual CRT system, but that's an entirely separate issue.

D. Conclusion: The F11/F12 snd_hda_intel driver and/or requisites are sick.

Thanks!
Ed Leaver

Can you test with fedora 12 livecd and report if it works with it.

Yes, the problem persists with F12-Snap3-x86_64-Live. But testing the live CD is too painful even to be fun. This problem appears to be identical with Bug 521004 where I have a F12 hard disk install, working network, yum, gcc, gdb, kmemtrace, a reliable boot when snd-hda-intel is blacklisted, easy bug reproduction by un-blacklisting followed by modprobe snd-hda-intel, and relatively fast recovery via booting in CentOS and re-blacklisting the /F12/etc/modeprobe.d/blacklist.conf. Unless someone else has a compelling reason, I really don't see the point in further LiveCD testing until after the problem is resolved in the hard disk install, against le kernel-du-jour. Are there any kernel driver-level memory sniffers in addition to kmemtrace? I haven't tried kmemtrace yet, and don't wish to if there is something more appropriate for this particular task. Any buggestions? Should we move this discussion to Bug 521004? Thanks!
Ed Leaver

Since this bugzilla report was filed, there have been several major updates in various components of the Xorg system, which may have resolved this issue. Users who have experienced this problem are encouraged to upgrade their system to the latest version of their packages. For packages from updates-testing repository you can use command

yum upgrade --enablerepo='*-updates-testing'

Alternatively, you can also try to test whether this bug is reproducible with the upcoming Fedora 12 distribution by downloading LiveMedia of F12 Beta available at http://alt.fedoraproject.org/pub/alt/nightly-composes/ . By using that you get all the latest packages without need to install anything on your computer. For more information on using LiveMedia take a look at https://fedoraproject.org/wiki/FedoraLiveCD .

Please, if you experience this problem on the up-to-date system, let us now in the comment for this bug, or whether the upgraded system works for you.

If you won't be able to reply in one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.

[This is a bulk message for all open Fedora Rawhide Xorg-related bugs. I'm adding myself to the CC list for each bug, so I'll see any comments you make after this and do my best to make sure every issue gets proper attention.]

Yes, the problem still exists with the 2.6.31.5-96.fc12.x86_64 kernel. But it doesn't seem to be in Xorg as initially reported, but rather in the snd_hda_intel driver stack. (See my previous two posts.) When snd_hda_intel is blacklisted F12 seems to work fine. Awfully quiet, though...

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Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 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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