Public bug reported:
Hi,
Hardware : IBM T40p, HDD Samsung HM120JC 120Gb PATA (not the original drive of
the laptop, I bought this new one ; I didn't try with original drive as I don't
have it any more)
Sofware : Ubuntu Edgy, not modified kernel 2.6.17-6.18 686.
Problem is *exactly* the same on up-to-date Dapper (actually I switched
to edgy to see if this could solve my issue, with no luck).
Problem 1 : DMA (nor io32, nor multicount, nor lookahead) is never
activated at boot, this makes my system very very slow and unresponsive.
I switched to cfq elevator as pointed in a 2.6.15 bug somewhere, i
probably gained a little, but I can't notice it.
Workaround 1 : i wrote a hdparm.sh script which does :
hdparm -c 1 -d 1 -A 1 -a 1024 -m 16 -u 1 -X 69 /dev/hda
and everything is fine when I launch this script manually after my session is
open (but opening my session takes ages without DMA, and the mouse cursor can't
even move...).
Why this script :
Problem 2 : configuring /etc/hdparm.conf with the same values and
activating /etc/init.d/hdparm, I can't make the system apply this
settings during the boot process. /etc/init.d/hdparm, linked to
/etc/rc[S2].d/ at various times (i tried S10, S30, S50, S99...) doesn't
seem to apply any parameter... I says it does (i put some log_begin_msg
to verify) Wherever I put it, i *must* run the script manually after my
GNOME session is open, else DMA optimization isn't applied to my disk.
After applying my script, everithing is OK (disk works correctly). I
experienced some freezes under Dapper but I don't think they are
related. SMART tests on the disk say it is OK (did a short and a long
test with smartctl, no errors reported).
So this could be a bug, but i would like any advice that could make me
understand why these settings can't be applied during boot process (even
aren't they applied if I put the script in my
System->Preferences->Session->Programs at Startup)...
I will attach dmesg, lspci -vv and my script shortly.
** Affects: linux-source-2.6.17 (Ubuntu)
Importance: Untriaged
Status: Unconfirmed
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PATA disk, DMA is never activated at boot, very slow system
https://launchpad.net/bugs/56121
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