On 01/20/2015 11:33 AM, Alex Regan wrote:
Hi,
I have a fedora21 box and periodically the display stops responding. The
display on the monitor is blank, and trying to wake it again with the
mouse or keyboard is not successful.
I can VNC into the system, and while the screensaver is on with the
clock in the center, the clock does continue to update.
It's like my keystrokes aren't being acknowledged, I'd say.
I can access the system remotely via ssh. I've tried killing Xorg, but
nothing changes. It just comes back in this screensaver mode and the
monitor is still unresponsive.
I'm using the default driver that's chosen at install time for an ATI
Radeon chipset.
I've looked through the Xorg.9.log file and there is nothing indicating
any type of helpful error message.
How can I troubleshoot this further? Perhaps it's a known problem?
Uhm, are you certain it's just the screensaver or could it be the
machine is going into suspend or sleep state? In some cases, sleep or
suspend also powers down the USB ports. If you're using USB keyboards
or mice, that could prevent the items being seen. This can be disabled.
The shotgun approach is, as root:
for i in /sys/bus/usb/devices/*/power/autosuspend; do echo 2 > $i;
done
This would turn off autosuspend for all USB devices.
Could it be in suspend mode while still being able to access it remotely
via ssh?
Yes, it's possible as the machine wakes up on network access. Problem
is that it doesn't necessarily wake up the USB ports. I've seen that
before.
Good tip for the autosuspend, though. Is there no way to do this via the
desktop apps?
Uhm, not that I know of. You could put those commands in
/etc/rc.d/rc.local and it'd happen on boot.
I've turned the PC over to my father-in-law now, so I'll either need to
explain to him how to do it, or try and do it remotely.
Remember, I don't KNOW if the USB suspend is happening, it was something
to check. There may be something else that's causing this.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- Okay, who put a "stop payment" on my reality check? -
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