Messages in this thread |  | | Date | Tue, 6 Feb 2007 21:22:00 +0000 (GMT) | From | James Simmons <> | Subject | Re: [Linux-fbdev-devel] [PATCH] nvidiafb: allow ignoring EDID info |
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> On 2/5/07, Luca Tettamanti <kronos@people.it> wrote: > > get-edid uses the BIOS, while the other two talk directly over the I2C > > bus. > > > > Try loading i2c-dev (I2C_CHARDEV); With i2cdump[1] you can read the EDID > > block, which resides at address 0x50: > > > > i2cdump N 0x50 (where N is the bus number) > > > > If you are unshure about bus number try with all the available > > /dev/i2c-* devices (you may want to unload HW monitor drivers first, so > > you don't poke at random stuff). > > No luck. i2c-dev and dependencies are loaded > """ lsmod | grep i2c reports """ > i2c_i801 7404 0 > i2c_isa 5152 0 > i2c_piix4 8140 0 > i2c_algo_pcf 6180 0 > i2c_algo_pca 5380 0 > i2c_algo_bit 8424 0 > i2c_dev 8548 0 > i2c_core 19680 7 > i2c_i801,i2c_isa,i2c_piix4,i2c_algo_pcf,i2c_algo_pca,i2c_algo_bit,i2c_dev > """" > > There is no such thing as /dev/i2c* UNLESS I load nvidiafb. When I > load that, I get three busses (i2c-0, -1, and -2), but i2cdump N 0x50 > gives me a nice tableau of X's all around, for all values of N. This > is using kernel 2.6.18-3 stock Debian kernel. I'll keep trying with > some variations, to see if I can get more sensible information.
There is no stand alone nvidia card i2c driver. Its the issue of sharing device interfaces with the same hardware problem again!!! There is a patch for DRI and fbdev but it really looks like we need a generic solution.
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