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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Split screen/display corruption issue on HP EliteOne 800 G2 23-in Touch AIO"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97822#c35">Comment # 35</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Split screen/display corruption issue on HP EliteOne 800 G2 23-in Touch AIO"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97822">bug 97822</a>
from <span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span></b>
<pre>(In reply to r.r.arends from <a href="show_bug.cgi?id=97822#c33">comment #33</a>)
<span class="quote">> (In reply to Ville Syrjala from <a href="show_bug.cgi?id=97822#c31">comment #31</a>)
> > Hmm. I guess one weird possibility would be that the EDID would be at some
> > alternate address. I can't recall if that's allowed by the spec, but IIRC in
> > the distant past there were a few addresses that could house the EDID.
> >
> > Please run something like this as root so we can probe the entire i2c
> > address range:
> > modprobe i2c-dev ; i2cdetect `grep DPDDC-A /sys/class/i2c-dev/*/name | cut
> > -d '/' -f 5 | cut -d '-' -f 2`
>
> root@fuckeduphp:~# modprobe i2c-dev ; i2cdetect `grep DPDDC-A
> /sys/class/i2c-dev/*/name | cut -d '/' -f 5 | cut -d '-' -f 2`
> WARNING! This program can confuse your I2C bus, cause data loss and worse!
> I will probe file /dev/i2c-3.
> I will probe address range 0x03-0x77.
> Continue? [Y/n] Y
> 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 1d 1e 1f
> 20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
> 30: 30 -- -- -- -- 35 -- -- 38 39 3a 3b 3c 3d 3e 3f
> 40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
> 50: -- -- -- -- -- -- -- 57 -- -- -- -- -- -- -- --
> 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</span >
That... looks totally crazy. So it seems to be acking almost all addresses,
except the ones we might actually care about.</pre>
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