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Thread: System Freeze on Switch user

  1. #21
    Join Date
    Sep 2008
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    27

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    Quote Originally Posted by RealNC View Post
    VT switching works just fine. Restarting the X server is what locks up the machine. (Press CTRL+ALT+Backspace in X. Viola, bye bye system. Needs hard reset.)
    I can restart X-server just fine, and switch VT's. The hard lock only happens when I start another X-session.

  2. #22
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    Jun 2008
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    51

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    Quote Originally Posted by Odur View Post
    I can restart X-server just fine, and switch VT's. The hard lock only happens when I start another X-session.
    Same here. Restarting X is fine. Starting a second X session causes total machine lockup.
    I used to get lockup restarting X, but that was fixed a few releases ago.

  3. #23
    Join Date
    Dec 2008
    Location
    San Bernardino, CA
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    User switching is what causes Hard Lock Hell for me using fglrx. I haven't tested VT Switching. This is 100% reproducible on a ATI 4670 card & Ubuntu 8.04 LTS (w/latest updates):

    1. Log in as a user to default desktop.
    2. Switch to a different user using the Fast User Switch agent.
    3. Log in as the new user.
    * HARD LOCK *

    Also, switching users from the screensaver will also lock the system. Sometimes 1 user switch will work, but then trying to switch back to the original user will HARD LOCK the system.

  4. #24

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    For me, even restarting the X server results in a backtrace and the system will eventually lock up.

  5. #25
    Join Date
    Jun 2008
    Posts
    51

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    Bridgeman,

    Any update on investigating this?

  6. #26
    Join Date
    Jan 2009
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    18

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    Quote Originally Posted by gururise View Post
    User switching is what causes Hard Lock Hell for me using fglrx. I haven't tested VT Switching. This is 100% reproducible on a ATI 4670 card & Ubuntu 8.04 LTS (w/latest updates):

    1. Log in as a user to default desktop.
    2. Switch to a different user using the Fast User Switch agent.
    3. Log in as the new user.
    * HARD LOCK *

    Also, switching users from the screensaver will also lock the system. Sometimes 1 user switch will work, but then trying to switch back to the original user will HARD LOCK the system.
    This is 100% reproducible on a ATI HD 3850 (agp) & opensuse 11.1 (w/latest updates)

  7. #27
    Join Date
    Dec 2008
    Location
    San Bernardino, CA
    Posts
    232

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    Quote Originally Posted by monomakh View Post
    This is 100% reproducible on a ATI HD 3850 (agp) & opensuse 11.1 (w/latest updates)
    Just want to mention that this problem is reproducible with both Catalyst (fglrx) 8.12 and the new 9.1! I am running 64-bit Ubuntu 8.04LTS if that helps... My multi-user linux is effectively a single user system with fglrx.

  8. #28
    Join Date
    Feb 2009
    Posts
    4

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    Quote Originally Posted by gururise View Post
    Just want to mention that this problem is reproducible with both Catalyst (fglrx) 8.12 and the new 9.1! I am running 64-bit Ubuntu 8.04LTS if that helps... My multi-user linux is effectively a single user system with fglrx.
    Same symptoms on OpenSUSE 11.1 with HD3650 card, even just logging out of X will cause a hard lock.

    Niel

  9. #29
    Join Date
    Feb 2009
    Posts
    1

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    Same sysmptoms on OpenSuSE 11.0 with HD3450 card. No problems on logging out, but immediate freeze when trying to start a second X-Session.

    Interesting thing: when I used the built in HD3200 from the 780 Chipset this did not occur.

  10. #30

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    The solution at/near the end of this thread solved my problem, maybe they will help you guys, too. (http://bbs.archlinux.org/viewtopic.php?id=57084&p=3)

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