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Richard Purdie wrote: > Ignoring whether this is a good idea or not, under 2.6.15 you could run > > dd if=/dev/zero of=/dev/fb0 > > which would clear the framebuffer. It would end up saying "dd: /dev/fb0: > No space left on device". > > Under 2.6.16 (and a recent git kernel), the same command clears the > screen but then hangs. Was the change in behaviour intentional? > > I've noticed this on a couple of ARM based Zaurus handhelds under both > w100fb and pxafb. > There is a change in behavior of fb_read and fb_write committed Jan 2006. They return the number of bytes read or written if the requested size is bigger than the remaining space. Previously, they returned -ENOSPC. But I haven't experienced hangs... Tony - 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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