From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Murphy Subject: Re: Monitor's EDID not recognised Date: Sat, 8 Mar 2008 00:39:55 +1100 Message-ID: <200803080039.55332.jeremy.william.murphy@gmail.com> References: <200803071923.32035.jeremy.william.murphy@gmail.com> <200803072237.36693.jeremy.william.murphy@gmail.com> <20080307131120.4891f78e@hyperion.delvare> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20080307131120.4891f78e-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org> Content-Disposition: inline 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: Jean Delvare Cc: i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org List-Id: linux-i2c@vger.kernel.org On Fri, 7 Mar 2008 11:11:20 pm Jean Delvare wrote: > On Fri, 7 Mar 2008 22:37:36 +1100, Jeremy Murphy wrote: > > > > 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: I've just learnt that a number of people could no longer access their EDID after upgrading their nvidia driver to the 100.* series. I downgraded to 96.43.01 and now their is _something_ on the I2C nvidia bus 1, but it's not pretty. These following results are inconsistent, which I'm guessing is not a good sign. They vary somewhat between each call but they always have a similar pattern (row+col). > i2cdetect 1 This is with eeprom loaded: 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3f 40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f 50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f 60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70: 70 71 72 73 74 75 76 77 This is without: 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- 0b 0c 0d 0e 0f 10: 10 11 12 13 14 15 16 -- -- -- -- -- -- -- -- -- 20: -- -- -- -- 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f 40: 40 41 42 43 44 -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- 5a 5b 5c 5d 5e 5f 60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70: 70 71 72 73 74 75 76 77 At a guess, I'd say this is garbage? > i2cdetect 2 > i2cdetect 3 Both empty. > 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.) This is the output of i2cdump 1 0x50: 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 00: 3f XX XX XX XX XX XX XX XX XX XX 00 00 00 00 00 ?XXXXXXXXXX..... 10: 00 00 00 00 XX XX XX XX XX XX XX XX XX XX 00 00 ....XXXXXXXXXX.. 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 30: 00 00 00 00 00 XX XX XX XX XX XX XX XX XX 00 00 .....XXXXXXXXX.. 40: 00 00 00 00 00 00 00 00 XX XX XX XX XX 00 00 00 ........XXXXX... 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 60: 00 00 00 00 00 00 00 00 00 00 00 XX XX XX XX XX ...........XXXXX 70: XX XX XX XX XX XX 00 00 00 00 00 00 00 00 00 00 XXXXXX.......... 80: 00 00 XX XX XX XX XX XX XX XX 00 00 00 00 00 00 ..XXXXXXXX...... 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ a0: XX 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 X............... b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ c0: 00 00 00 00 XX XX XX XX XX XX XX XX XX XX XX 00 ....XXXXXXXXXXX. d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ f0: 00 00 00 00 00 00 XX XX XX XX XX XX XX XX XX XX ......XXXXXXXXXX I presume the monitor has an EDID because the brochure says that it supports DDC-2B and DDC-2Bi, and it's relatively recent as far as CRTs go. Thanks for your help, cheers. Jeremy _______________________________________________ i2c mailing list i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org http://lists.lm-sensors.org/mailman/listinfo/i2c