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I have run into a problem on multiple computers after installing Mint 15
MATE. I believe this occurred with the 32-bit version as well, but I
can't be absolutely sure. At the moment, the hardware is an HP
Elitebook 2540p laptop.
The original problem as I identified it was that I would set the
screensaver and power management functions to activate after a
substantial amount of time (e.g. 60 minutes on this last attempt), and
yet the screen will blank after either 5 or 10 minutes anyway (also
weird that it varies between either 5 or 10 mintues). I also observed
this problem while playing a video; despite running full-screen (using
either VLC or the Videos players), the screen will still blank out.
I did a lot of searching for this problem, and found that this is
reported in several flavors of Linux, not just Mint, and people are
complaining about various screensavers, though the core problem is
identical. The solution? Everyone says: "I just uninstalled the ____
screen saver and instead installed the ____ screensaver and suddenly it
works fine." You should know that there is some other problem involved
when some people are switching from xscreensaver to MATE screensaver,
while others are doing the exact opposite, in order to correct the
problem. But, there are other screensavers involved that I saw
mentioned, too.
Well, I attempted the same 'solution.' I was running Mint 15 MATE 64bit
on this latest instance, so the default screensaver was MATE. Now,
maybe the fact that I'm a bit of a Linux n00b helped bring this to
light, but I did this wrong... I installed xscreensaver BEFORE
uninstalling the MATE screensaver, thus momentarily had TWO
screensavers, and the problem persisted. I eventually un-installed
xscreensaver as well, so that there is no screensaver whatsoever, and it
still appears that the power settings are kicking in and blanking the
screen (with backlight OFF) after 10 minutes anyway, despite the power
management being set to 60 minutes.
The oddity? With zero screensavers and the power function set to kill
the monitor at 60 minutes, I can now at least play videos full-screen,
and the power management function does NOT kick in early.
All of this points to me that there is some sort of "partial power
management function" that is in the core OS, since (as I mentioned
earlier) people are reporting this in more than just MINT, while it
involves screen blanking and is irrelevant of screensaver.
Another possible hint as to the source of this, or otherwise a totally
different bug:
At one point a couple of days ago, I had been running off of wireless
LAN while unplugged from power as well. I shut the wireless off and
attached a CAT-6 cable, and even though the jack's connection and
collision lights came on (with normal collision activity), Mint did NOT
register any connection. I fought this for several minutes, trying
different things. Finally, in the midst of it, I realized power was
getting pretty low on the battery, and so I grabbed and plugged in the
power cable. INSTANTLY the wired LAN connection created a link. This
would point to a problem that was only resolved when the power profile
changed.
Whether this is the same issue or not, both point to some weird power
settings. All this time with Mint 15, and the only two "bugs" I find
are both power-management-related? Hmmmm
All this aside, proper kudos must be given as to the OS being the best
I've ever seen. It is spectacular that I can fire up the laptop from
completely OFF, and be logged-in and running before my "fast" work
desktop, running Windows 7, can even get to the login prompt. I think
I'm going to dress as Tux for Halloween. :-)
Thank you,
Dave Leavitt
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: blank management mate power profile screensaver setting xscreensaver
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partial power manager function latent in core OS (?)
https://bugs.launchpad.net/bugs/1242521
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