Bug#622993: every 10s I get "[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid ..."

[Lisandro Damián Nicanor Pérez Meyer]

(Sorry if I'm spawning a very old thread here).

After all this time I have been patching my kernels to workaround [0][1]

[0] <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=624549>
[1] <https://bugs.freedesktop.org/show_bug.cgi?id=37040>

Some time ago I found [2] and today I finally solved the problem.

[2] <http://www.blaicher.com/2012/06/howto-fixing-a-broken-edid-eeprom-with-a-bus-pirate-v4/>

Some stuff I learned: the kernel does ignores checksums mismatches by 8... in 
the positive side! My mismatch was exactly -1, ie, 255.

I have been modifying the original patch to workaround this since 2011. I'm 
attaching my last patch in case someone else needs it. It does adds a kernel 
parameter to ignore edid mismatches.

Kinds regards, Lisandro.


-- 
Theory and practice sometimes clash. And when that happens, theory loses.
Every single time.
  Linus Benedict Torvalds.

Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/
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