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<H1>[Mageia-dev] Issues with dracut</H1>
<B>Colin Guthrie</B>
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TITLE="[Mageia-dev] Issues with dracut">mageia at colin.guthr.ie
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<I>Sat Dec 17 00:18:50 CET 2011</I>
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<PRE>'Twas brillig, and JA Magallon at 16/12/11 22:52 did gyre and gimble:
><i> On Fri, 16 Dec 2011 12:35:22 +0000
</I>><i> Colin Guthrie <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">mageia at colin.guthr.ie</A>> wrote:
</I>><i>
</I>>><i> Hiya,
</I>>><i>
</I>>><i> 'Twas brillig, and JA Magallon at 16/12/11 12:06 did gyre and gimble:
</I>>>><i> After those couple previous thread it looks like move to dracut is
</I>>>><i> ongoing, so I decided to try it.
</I>>><i>
</I>>><i> Good! This is exactly the kind of feedback we need!
</I>>><i>
</I>>>><i> I found a couple problems:
</I>>>><i>
</I>>>><i> - dracut inists on loading nouveau driver. With mknitrd, just booting with nokmsboot
</I>>>><i> works. Booting with a dracut generated initrd ignores that. I think it is plymouth
</I>>>><i> that forces it, even if I added 'blacklist nouveau' in a .conf file in modprobe.d:
</I>>>><i>
</I>>>><i> dracut -f:
</I>>><i>
</I>>><i> I'll include it but if it's blacklisted, it shouldn't ultimately be used
</I>>><i> in the ramfs even if it's included. That said, it's clearly inefficient
</I>>><i> to include it if it is blacklisted so we should try and fix that. Anssi,
</I>>><i> could this be your code to detect the h/w that causes it to bypass any
</I>>><i> blacklist checks (not sure if there are actually any blacklist checks
</I>>><i> when building the initrd... not relaly looked at it much)ç
</I>><i>
</I>><i> Clue...
</I>><i> Let's state all my findings. As 'nokmsboot' was ignored, i remembered CentOS
</I>><i> where the nvidia installer achived the same blacklisting nouveau.
</I>><i> I added the blacklist in /etc/modprobe.d/display-driver.conf, which is a
</I>><i> symlink to /etc/nvidia-current/modprobe.conf. It didn't work.
</I>><i> After the fiasco with symlinks in systemd, i tried creting a new file.
</I>><i> And it worked. So there is something strange with symlinked files...
</I>
That's interesting... The code in question:
./modules.d/90kernel-modules/module-setup.sh: for i in $(find
/etc/modprobe.d/ -type f -name '*.conf'); do
So it only finds files.
If I change "find" to "find -L" this should fix up this problem (when
the files are installed, links are dereferenced so that won't be a problem).
This should avoid any such similar problems.
Also I believe it's pointless to go into any subfolders here, so adding
also a -maxdepth 1 should cut down on unnecessary includes.
>>><i> - initrd from dracut fails to detect one of my drives, and booting stops:
</I>>><i>
</I>>><i> OK, this is more interesting.
</I>...
><i>
</I>><i> I found the problem:
</I>><i>
</I>><i> lsscsi:
</I>><i> werewolf:~/dr# cat lsscsi*
</I>><i> [0:0:0:0] disk ATA ST3250310AS 3.AA /dev/sda
</I>><i> [1:0:0:0] disk ATA WDC WD3200AVJS-6 12.0 /dev/sdb
</I>><i> [2:0:0:0] disk ATA ST3320620AS 3.AA /dev/sdc
</I>><i> [3:0:0:0] disk ATA ST3500418AS CC38 /dev/sdh
</I>><i> [5:0:0:0] cd/dvd HL-DT-ST DVDRAM GH22NS50 TN01 /dev/sr0
</I>><i> [6:0:0:0] disk Generic USB CF Reader 0.00 /dev/sdd
</I>><i> [6:0:0:1] disk Generic USB SD Reader 0.00 /dev/sde
</I>><i> [6:0:0:2] disk Generic USB MS Reader 0.00 /dev/sdf
</I>><i> [6:0:0:3] disk Generic USB SM Reader 0.00 /dev/sdg
</I>><i>
</I>><i> The disk has been renamed as sdh
</I>
><i> I changed the mounting points from devices to labels and all worked fine.
</I>><i>
</I>><i> This will probably not be an issue with standard install, using UUIDs,
</I>><i> but the real problem is that drive name asssignment is even more random
</I>><i> (well, interlaced ;)).
</I>
Hmm, interesting. Not quite sure why it's doing that but as it's using
udev rather than any manual driver loading, it's likely a more
predicable system overall in the long term.
Col
--
Colin Guthrie
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