From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp3-g21.free.fr ([212.27.42.3]:51415 "EHLO smtp3-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751577AbZDLRRy (ORCPT ); Sun, 12 Apr 2009 13:17:54 -0400 Date: Sun, 12 Apr 2009 19:08:31 +0200 From: Jean-Francois Moine To: ErV2005@rambler.ru Cc: linux-media@vger.kernel.org Subject: Re: Dark picture on Genius E-Messenger 112 webcam with yesterday's v4l-dvb code. Message-ID: <20090412190831.0350590f@free.fr> In-Reply-To: <200904111816.14704.ErV2005@rambler.ru> References: <200904111816.14704.ErV2005@rambler.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: On Sat, 11 Apr 2009 18:16:14 +0400 Victor wrote: > Hello. Hello Victor, > I'm using Genius E-Messenger 112 webcam on Slackware 12.2 with > 2.6.27.7 kernel (custom-built) and yesterday's v4l-dvb sources > checked out via "mercurial" ("hg log" returns "11445:dba0b6fae413" as > latest commit). the camera uses gspca_main and gspca_pac207 kernel > modules.` > > Camera works (with LD_PRELOAD=v4l2convert.so) in mplayer (mplayer > tv://) and skype, but picture is way too dark. It looks like > "contrast" is permanently set at maximum, and doesn't change > (although it looks like camera tries to adjust brightness > automatically). > > How can this be fixed? Did you try to change the webcam controls? (there are brightness, exposure, autogain and gain - they may be changed by programs as v4l2ucp or vlc) > Few articles in the web talk about > "/sys/module/gspca/parameters/gamma", etc, but it looks like such > advice is outdated. I assume this device is not completely supported > (people on the web recommend to avoid using this camera on linux), so > perhaps I could provide additional data to make it work in the > future. Or, perhaps, someone could tell me where (in gspca source) I > could start trying to fix that problem. You may ask to Hans de Goede who is the maintainer of the pac207 driver. Cheers. -- Ken ar c'hentań | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/