Member Avatar for titico

hello

well I've got a little problem here.

I have a vaio laptop running ubuntu. I upgraded it from version 7.10 to 8.04 using the Update Manager.

I had no problem with installation, but now when I start the computer it remains freeze after the BIOS check...

I only get this message

Starting up...
[ 12.194676] ACPI: EC: acpi_ec_wait timeout, status = 0, expect_event = 1
[ 12.194722] ACPI: EC: read timeout, command = 128

If someone can help me please =]

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  • Latest Post Latest Post by EdTheUniqueGeek

Dani AI

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The kernel lines you posted show an ACPI Embedded Controller (EC) timeout — the EC isn't responding to the kernel during early boot. That symptom usually points to a timing/race between EC initialization and the rest of the ACPI namespace (a known interaction in several kernels where EC starts too early). This is not a hardware symptom only; it’s often the kernel/ACPI code interacting badly with a vendor DSDT/EC implementation. (debian-fr.org)

Practical, non-destructive tests (do them one at a time):

  • Temporarily edit the boot entry from the GRUB menu: press E at the menu, find the linux/kernel line and remove quiet/splash so you can see boot messages, then append one test option and boot. Try these (one per test), in roughly this order: irqpoll, noapic, pci=noacpi, acpi=oldboot — use acpi=off only as a last resort because it disables ACPI/power management. If a test helps, make the change permanent via your distro’s grub config. (How to edit at boot varies by GRUB version; use the editor keys shown on the menu.) (documentation.suse.com)

Vendor ACPI helpers can also cause trouble. On many Vaio machines the sony_laptop / sony-laptop interface is involved; as a quick test you can unload it from a working shell:

sudo modprobe -r sony_laptop

If unloading it lets the machine boot, blacklist it persistently by adding blacklist sony_laptop to a file under /etc/modprobe.d/. Don’t keep blacklisting without testing other functions (brightness, special keys, battery features). (askubuntu.com)

If none of the above helps, boot a LiveCD/rescue, collect logs and kernel info and post them: uname -a, cat /proc/cmdline, and dmesg | grep -i acpi (or inspect /var/log/syslog and /var/log/dmesg). Also check for BIOS/firmware updates for your Vaio and try an older kernel if available — this can confirm whether it’s a kernel regression or an ACPI/BIOS issue. The messages you gave are exactly the right things to collect for diagnosis.

Member Avatar for tlcoffee

Hi there,

There is a long discussion about this in Launchpad Bugs section for Ubuntu.

You might want to try booting up without the cord being plugged in so your booting with only the battery. Some have stated that works for them.

Best bet is to look over all the information in the bug report (link above) and/or search google. When searching for help I get awesome results by just adding the word ubuntu and then my search query.

Member Avatar for EdTheUniqueGeek

You also may want to try booting with the LAN card disabled in your BIOS to see if it will boot.
I know I had to disable my LAN card on my Dell.

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