[Bug 508516] Re: wakeup from sleep fails on toshiba nb305

[jim_charlton]

I can add a few observations to the "slow boot" problem on the Toshiba
NB305.

If one boots the disk with no kernel parameters then there is a long
pause in the boot process of about 6 or 7 minutes after which the system
boots and acts normally.  This is also true of suspend and resume.
There is a 6 or 7 minute hang in the resume, after which the system
resumes and runs normally.  Why is there the long hangs in the boot  and
resume processes?

If you boot with the kernel parameter "init=/bin/bash" then the system
will boot fairly fast to open a shell.  The boot process is stopping
just after the file system is mounted and chroot to the file system has
occurred.  But the file system "init" (upstart) has not yet run.  At
this point if you check the hard disk parameters by running (as root)
"hdparm -tT /dev/sdax", where sdax is the disk partition mounted as /
(it is sda5 on my machine), then the disk performance is terrible
(938.90 kB/sec and 430.55 kB/sec for instance).  If you run init by
typing "exec init" then there is a long delay after which gdm starts.
If you open a terminal window and test the drive again you will find
that it runs at full speed (573.54 MB/sec and 46.58 MB/sec, for
instance).

I am pretty sure that the long delays in booting and resuming have to do
with the drive problem.  But I cannot figure out what is running during
the upstart process that "cures" the drive problem.  If we knew what it
was... we might cure the problem earlier in the boot process and be able
to use the machine with highres timers turned on.

All I know, is that running "exec init --verbose" indicates that the
upstart jobs mountall, hostname, plymouth, hwclock and ureadahead have
all started running before the big delay.  One of the later jobs,
triggered by event flags set by mountall, is somehow "fixing" the disk
after a long delay.

I will report further progress... if any! :-)  Any help or suggestions
would be welcome.

-- 
wakeup from sleep fails on toshiba nb305
https://bugs.launchpad.net/bugs/508516
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