https://bugzilla.kernel.org/show_bug.cgi?id=57571
--- Comment #17 from Marwan Tanager <marwan.t...@gmail.com> 2013-05-06
17:41:03 ---
(In reply to comment #11)
> Can you connect the machine via ssh after "freeze"? I suggest it is blank
> screen.
- With the laptop (IP 192.168.1.117) being freezed:
marwan@marwan-desktop:~$ ssh 192.168.1.117
ssh: connect to host 192.168.1.117 port 22: No route to host
- In the normal case:
marwan@marwan-desktop:~$ ssh 192.168.1.117
Welcome to Ubuntu 12.10 (GNU/Linux 3.9.0 x86_64)
* Documentation: https://help.ubuntu.com/
*
* 0 packages can be updated.
* 0 updates are security updates.
*
* New release '13.04' available.
* Run 'do-release-upgrade' to upgrade to it.
*
* No mail.
* Last login: Sat Apr 27 04:09:30 2013
The freeze is triggered by changing the brightness using the acpi_video0 sysfs
interface from the test script:
marwan@host:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.9.0 root=UUID=<uuid> ro
sudo ./fluctuate_bl.sh acpi_video0 0
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