Messages in this thread | | | Subject | Re: What PM should be and do (Was Re: Solving suspend-level confusion) | Date | Sat, 7 Aug 2004 02:08:24 +0200 | From | ( Éric Brunet) |
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Dans ens.mailing-lists.linux-kernel, vous avez écrit : >> > - support for telling what class of device a driver is handling (I'm >> > particularly interested in keeping the keyboard, screen and storage >> > devices alive while suspending). >> >> You can see that info today from userspace by looking in >> /sys/class/input, /sys/class/graphics, and /sys/block
It is a minor point, but as many people are working on swsuspend right now, I thought I'd mentionned it. It seems (as of 2.6.8.rc1) that the screen is not shut down or put in a low power state when suspending to disk.
I guess that for 99.5 % of the population, it is not an issue as the monitor is usually plugged in the power supply of the computer and power is cut when the computer shuts down. My monitor, however, is directly plugged in the mains outlet and, after a suspend to disk, it displays indefinitely an information box stating that it has no video signal coming in.
The X server knows how to shutdown (DPMS) the screen afer some inactivity, so I guess the kernel could do that while suspending. And it would be very nice if it would. But I believe there is no device driver handling the monitor, so I don't know where to do it.
Éric Brunet - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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