Hello, Powersaving is everywhere, including accessibility. User-level daemons use /dev/vcsa to know what text is displayed on the screen. Problem is: there is no way to _wait_ for an update to happen, so these daemons actually poll every e.g. 40ms so as to be reactive enough for smooth user experience. That means waking up 25 times per second, which is not so greenish while the computer could be completely idle else. An ioctl could be devised to wait for updates, but I was wondering if there could be a way to just use inotify for that. However, drivers/char/vc_screen.c would have to collect the list of opened files in order to notify all of them (processes may even have opened another node with same devno as /dev/vcsa), which is not really pretty, and actually maybe some other device drivers would want to achieve the same kind of thing, so I was wondering whether that could fit into another place like the generic device infrastructure? Samuel -- To unsubscribe from this list: send the line "unsubscribe linux-console" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
