From mboxrd@z Thu Jan 1 00:00:00 1970 From: s.hauer@pengutronix.de (Sascha Hauer) Date: Thu, 30 Jan 2014 08:45:26 +0100 Subject: imx-drm: screen flickering In-Reply-To: <201401291553.15040.marex@denx.de> References: <20140129111557.GI16215@pengutronix.de> <201401291553.15040.marex@denx.de> Message-ID: <20140130074526.GQ16215@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Jan 29, 2014 at 03:53:14PM +0100, Marek Vasut wrote: > On Wednesday, January 29, 2014 at 12:15:57 PM, Sascha Hauer wrote: > > Hi Christian, > > > > On Tue, Jan 28, 2014 at 09:11:32AM +0100, Christian Gmeiner wrote: > > > Hi all. > > > > > > From time to time it happens that my LVDS display is flickering (look > > > at scroll bar in the video). > > > https://drive.google.com/file/d/0B_fznDimUHVubWtvVFlMTkdBbUU/edit?usp=sha > > > ring > > > > > > I really want to find the root cause of it, but I do not know where to > > > start. I can trigger this > > > sometimes after xscreensever "blanks" the screen and the screensafer > > > gets disabled > > > via user input. > > > > > > Any hints? > > > > Sorry, no idea. Philipp and me watched the video, but we both haven't > > seen something like this before. > > Isn't it the clock polarity being inverted thing again [1]? Could be, at least the result should look similar. I just wonder why it only happens after a few times doing something. I would expect the clock is always inverted then. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |