black screen and computer hang on logout

[evcz]

Just upgraded the system from 7.10 to 8.04.

now running:
Description: Ubuntu 8.04
Release: 8.04

kernel:
Linux laptop 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

Since the upgrade randomly (with high probability) I got a laptop (intel centrino platform - i855gm - fujitsu amilo m1405) that hangs when doing a logout/reboot/shutdown.

This is not happening all the times (happening 90% of the times).

(I was having shutdown problems with an "old" 7.10 kernel, but the last one was working fine, but that time the problems where different)

This time the problem looks different, the PC do not hang on the ubuntu splash as it was used to do with the old 7.10 kernel, instead, as soon as i press the logout or the reboot or the shutdown botton from the gnome control panel the monitor get shutdown (not just black) and the pc stay active untill I press the power botton for more then 4seconds.

If I do not press the power botton on the pc case, the CPU fan keep running at full speed (looks like the CPU is doing a lot of work?)

Tryied the previous suggestions (nosplash and reboot=b) but those didn't helped :(

Graphic driver in use is "intel", X11 is "clean", laptop mode is enabled, cpu frequency scaler is cpufreq (not using powernowd).

In the logs I couldn't see something usefull :(

attached there's a portion of messages that should be related to one of the "hangs"

[Patrick Kilgore (patrick-kilgore)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it, because your description didn't include enough information.

Please include the information as separate attachments:
 * Output of uname -a
    * uname -a > uname.txt
 * Output of sudo lspci -vvnn
    * sudo lspci -vvnn > lspci.txt
 * Output of sudo dmidecode
    * sudo dmidecode > dmidecode.txt
 * Try to shutdown after resume and then restart the system and attach /var/log/kern.log.0
 * Tarball of /proc/acpi directory. You can't just tar all files because their content sometimes changes etc.
    * cp -r /proc/acpi /tmp
    * tar -cvjf ~/acpi.tar.bz /tmp/acpi
    * attach acpi.tar.bz from your home directory

[evcz (evolutioncrazy)]

I'm sorry. but I do not know how to accomplish this:

"Try to shutdown after resume and then restart the system and attach /var/log/kern.log.0"

I've tried to do an "hibernate", but the monitor "died" and the pc hanged this time too...

when it hangs, this happens exactly when it looks like starting to do the logoff, I'm not sure if it's something related to the powerdown... or something that happens before ACPI get involved.

will attach the other files, and will try to see what will happens leaving the pc "hanged" for some more minutes... hope the cpu will not burn :D

[evcz (evolutioncrazy)]

the same happens when doing a "shutdown" from the "options" menu in the login screen (before doing any login)... so I'm not sure if this even related to logoff.

Now going to try from the live cd... just to be sure if the problems comes from the upgrade or if it's happening also on the live cd itself.

[evcz (evolutioncrazy)]

ok, I can confirm that exactly the same things happens with the live cdrom without touching anything... just booting it and shutting it down.

looks similar to the other reported here for the 8.04RC:
https://bugs.launchpad.net/ubuntu/+bug/222056

[evcz (evolutioncrazy)]

Yes, getting the same exact problem also with the live cd, so shouldn't be any particular setting / change I made :(

[evcz (evolutioncrazy)]

IMHO this is not a but related to ACPI.

in fact exactly now I started the laptop, when I got the login screen I pressed CTRL + ALT + F1 to go to a terminal and got the exact same thing: laptop monitor shutdown and complete pc hang :/

It looks like a problem in the graphic drivers (my xorg.conf is quite "empty" compared to the old versions.... I tried to force i810 as drivers and for now 5reboot and none failed... finally can again switch to and from termina (ctrl + f1) without seeing the hang......

[evcz (evolutioncrazy)]

with i810 looks like this is not happening anymore...

[evcz (evolutioncrazy)]

current xorg.conf file.... with this way it works...

without the line:

 Driver "i810"

it kept hanging when trying to change the resolution (going to terminal with ctrl + alt + f1, or showing the console during the shutdown)

on the otherside using i810 xrandr shows only the laptop monitor, not the additional monitors :(

[evcz (evolutioncrazy)]

ok, this fixed the problem:

https://bugs.launchpad.net/debian/+source/xserver-xorg-video-intel/+bug/138256/comments/71

looks like

Option "ForceEnablePipeA" "true"

is needed also on my laptop :)