On Mon, Jan 15, 2007 at 01:26:21PM +0530, Abhijit wrote: First of all, if you want to make a new post, do not reply to an existing message as a short-cut to post a message to the lists. Email is not a disjunct set of messages, but is threaded, and mailing lists use this feature to provide a coherent archive. Some email clients (notably better than Microsoft based clients) also group messages into a thread. When ever you hit the "Reply" button, it adds information to your outgoing email that tells the rest of the world that it is a reply to that message. > I want to develop a monitor driver for 2.6 kernel and a ViewSonic > Monitor. I am stuck at a point where I am supposed to use the I2C > protocol and the driver. > > Basically, I want to set the monitor settings, brightness, contrast > by communicating with the graphics card drivers installed on the > system. This needs a I2C protocol communication. It would be very > helpful if someone provides some insight on the actual path I am > supposed to take. You're probably referring to ddc. The kernel doesn't have a driver for that, but the X server has. My system has /usr/X11R6/lib/modules/libddc.so which it uses to figure out what kind of monitor is connected: (II) MGA(0): I2C bus "DDC P1" initialized. (II) MGA(0): I2C device "DDC P1:ddc2" registered at address 0xA0. (II) MGA(0): I2C device "DDC P1:ddc2" removed. (II) MGA(0): I2C Monitor info: 0x8249848 (II) MGA(0): Manufacturer: SNY Model: 580 Serial#: 168xxxxx (II) MGA(0): Year: 2001 Week: 50 (II) MGA(0): EDID Version: 1.2 (II) MGA(0): Analog Display Input, Input Voltage Level: 0.700/0.300 V (II) MGA(0): Sync: Separate Composite SyncOnGreen (II) MGA(0): Max H-Image Size [cm]: horiz.: 36 vert.: 29 (II) MGA(0): Gamma: 2.20 (II) MGA(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display (II) MGA(0): First detailed timing is preferred mode (II) MGA(0): redX: 0.633 redY: 0.353 greenX: 0.294 greenY: 0.592 (II) MGA(0): blueX: 0.142 blueY: 0.097 whiteX: 0.283 whiteY: 0.298 (II) MGA(0): Supported VESA Video Modes: (II) MGA(0): 720x400@70Hz (II) MGA(0): 640x480@60Hz (II) MGA(0): 800x600@60Hz (II) MGA(0): 1024x768@60Hz (II) MGA(0): Manufacturer's mask: 0 (II) MGA(0): Supported Future Video Modes: (II) MGA(0): #0: hsize: 1280 vsize 1024 refresh: 60 vid: 32897 (II) MGA(0): #1: hsize: 1280 vsize 960 refresh: 60 vid: 16513 (II) MGA(0): Supported additional Video Mode: (II) MGA(0): clock: 108.0 MHz Image Size: 357 x 286 mm (II) MGA(0): h_active: 1280 h_sync: 1328 h_sync_end 1440 h_blank_end 1688 h_border: 0 (II) MGA(0): v_active: 1024 v_sync: 1025 v_sync_end 1028 v_blanking: 1066 v_border: 0 (II) MGA(0): Ranges: V min: 48 V max: 65 Hz, H min: 28 H max: 65 kHz, PixClock max 110 MHz (II) MGA(0): Monitor name: SDM-S81 (II) MGA(0): Serial No: 45xxxxx I don't know if the DDC interface is exposed to X clients, but if it is, that should be the way to play with the monitor settings. > "Legal Disclaimer: This electronic message and all contents contain > information from Cybage Software Private Limited which may be > privileged, confidential, or otherwise protected from disclosure. The > information is intended to be for the addressee(s) only. If you are > not an addressee, any disclosure, copy, distribution, or use of the > contents of this message is strictly prohibited. If you have received > this electronic message in error please notify the sender by reply > e-mail to and destroy the original message and all copies. Cybage has > taken every reasonable precaution to minimize the risk of malicious > content in the mail, but is not liable for any damage you may sustain > as a result of any malicious content in this e-mail. You should carry > out your own malicious content checks before opening the e-mail or > attachment." www.cybage.com Please remove this crap. It's utter and complete nonsense, especially on publicly archived mailing lists. Erik -- They're all fools. Don't worry. Darwin may be slow, but he'll eventually get them. -- Matthew Lammers in alt.sysadmin.recovery
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