From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Delvare Subject: Re: Monitor's EDID not recognised Date: Fri, 7 Mar 2008 13:11:20 +0100 Message-ID: <20080307131120.4891f78e@hyperion.delvare> References: <200803071923.32035.jeremy.william.murphy@gmail.com> <20080307110610.3a48021d@hyperion.delvare> <200803072237.36693.jeremy.william.murphy@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200803072237.36693.jeremy.william.murphy-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: i2c-bounces-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org Errors-To: i2c-bounces-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org To: Jeremy Murphy Cc: i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org List-Id: linux-i2c@vger.kernel.org On Fri, 7 Mar 2008 22:37:36 +1100, Jeremy Murphy wrote: > > I'm not sure why you would expect the EDID EEPROM on the ICH7 SMBus. > > I've never seen an EDID EEPROM there. The EDID EEPROM is typically > > accessed through an I2C bus on the graphics adapter. You will need a > > driver for this. The binary nvidia X11 driver should work, the nvidiafb > > framebuffer driver should work as well (that's what I am using myself). > > After loading the driver, 2 or 3 additional I2C buses should be listed > > by "i2cdetect -l" (don't forget to load i2c-dev beforehand), and > > decode-edid.pl (or the more user-friendly ddcmon script) should find > > the EDID on one of them. > > I'm using nvidia's binary driver v169.07, and yes, the nvidia I2C buses are > there. i2cdetect -l: > > i2c-3 i2c NVIDIA i2c adapter I2C adapter > i2c-2 i2c NVIDIA i2c adapter I2C adapter > i2c-1 i2c NVIDIA i2c adapter I2C adapter > i2c-0 smbus SMBus I801 adapter at 0400 SMBus adapter > > However, decode-edid.pl and ddcmon both report that an EDID EEPROM is not > found. Please provide the output of: i2cdetect 1 i2cdetect 2 i2cdetect 3 Either there is no EDID EEPROM connected at all (some monitors don't have them, in particular older models) or it has a format different from what the scripts expect. If anything shows up at 0x50 with i2cdetect, please provide a dump using i2cdump (rmmod eeprom first.) -- Jean Delvare _______________________________________________ i2c mailing list i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org http://lists.lm-sensors.org/mailman/listinfo/i2c