From: Richard Purdie <rpurdie@rpsys.net>
To: linux-fbdev-devel@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Subject: Behaviour change of /dev/fb0?
Date: Fri, 14 Apr 2006 11:16:08 +0100 [thread overview]
Message-ID: <1145009768.6179.7.camel@localhost.localdomain> (raw)
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.
Richard
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WARNING: multiple messages have this Message-ID (diff)
From: Richard Purdie <rpurdie@rpsys.net>
To: linux-fbdev-devel@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Subject: Behaviour change of /dev/fb0?
Date: Fri, 14 Apr 2006 11:16:08 +0100 [thread overview]
Message-ID: <1145009768.6179.7.camel@localhost.localdomain> (raw)
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.
Richard
next reply other threads:[~2006-04-14 10:16 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-14 10:16 Richard Purdie [this message]
2006-04-14 10:16 ` Behaviour change of /dev/fb0? Richard Purdie
2006-04-14 23:29 ` [Linux-fbdev-devel] " Antonino A. Daplas
2006-04-15 0:13 ` Richard Purdie
2006-04-15 0:53 ` Antonino A. Daplas
2006-04-15 0:53 ` [Linux-fbdev-devel] " Antonino A. Daplas
2006-04-15 4:31 ` Andrew Morton
2006-04-15 4:31 ` [Linux-fbdev-devel] " Andrew Morton
2006-04-15 5:38 ` [PATCH] fbdev: Fix return error of fb_write Antonino A. Daplas
2006-04-15 5:38 ` Antonino A. Daplas
2006-04-17 14:45 ` Richard Purdie
2006-04-17 14:45 ` Richard Purdie
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