There is a workaround that is working in my case and avoids hanged
shutdowns that could damage the filesystems.
I modified /etc/acpi/events/powerbtn so when the power button is pressed
it launches a custom script to do the shutdown that basically stops
lightdm, kills processes from users, waits
In my pc with Biostar TA890GXE, ATI RS690/780 with only 4000 series IGP
and kubundu 12.04 shows occational hanging problem. some times a squre
with dots appear around the mouse cursor and system freezes. On reboot
from grub menu or sometimes from bios a screen of certain coloured
strips are
Same problem here with Ubuntu 12.04 with latest updates and a Radeon
HD3600:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] RV635 [Radeon HD 3650/3750/4570/4580]
Tried the nomodeset trick mentioned above but it did not solve the
issue.
The problem occurs both with the
I never had this issue in Ubuntu 10.04 in the same computer with exactly
the same hardware.
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https://bugs.launchpad.net/bugs/750437
Title:
fglrx hard lockup on
Problem still occures on Toshiba A300 with ATI Radeon 3470. (Ubuntu
12.04.2, gnome-shell).
Almost every time I was informed that watchdog detected hard lockup on
cpu. (No log file to post at the moment)
I've tried adding nomodeset to GRUB_CMDLINE_LINUX_DEFAULT, but with no
luck.
Also tried this
Can confirm comments 49 and 50 resolved my issue on two machines running
the ATI driver.
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https://bugs.launchpad.net/bugs/750437
Title:
fglrx hard lockup on
Happens with Samsung Series 7 Chronos 700Z3A-S02DE, too. Having Intel
Core i5-2450m and AMD Radeon HD6490m.
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https://bugs.launchpad.net/bugs/750437
Title:
fglrx
Happens with precise and an ATI FirePro V4800. A reboot and a halt with
both kernel panic due to a tainted kernel.
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https://bugs.launchpad.net/bugs/750437
Title:
Same problem with VAIO E Laptop, FGLRX prevent shutdown and AMD website
drivers prevent boot but allows shutdown.
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https://bugs.launchpad.net/bugs/750437
Title:
In addition, run sudo update-grub
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https://bugs.launchpad.net/bugs/750437
Title:
fglrx hard lockup on shutdown
Status in “fglrx-installer” package in
Disabling kernel mode setting is important, as the driver doesn't
appear to take advantage of KMS yet. If you do not deactivate KMS, your
system might freeze when trying to switch to a tty or even when shutting
down via your DE.
Source: Arch Wiki
For Grub2, edit /etc/default/grub and add
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