[Bug 25520] Enabling and disabling TV output kills VGA output with KMS and non-KMS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=25520

--- Comment #15 from Bob Ham <rah at bash.sh> 2010-04-12 08:47:25 PDT ---
Using avivotool to find registers that differ between the working and broken
states, I've managed to reliably get the VGA output to work again after turning
off the TV output.

While setting all of the differing registers to their value from the working
state, the VGA output starts working properly when register 0x4f4 is set (to
value 0x0 from value 0x80000062.)  Setting this register alone does not fix the
VGA output.  Also, the ordering in which the registers are set is significant;
I have set the registers in reverse order and the VGA output is not fixed.

Attached are dumps of registers in the working and broken states and a log of
the output of avivotool while fixing the VGA output.  The log shows which
registers are set to which value and the order in which they are set.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.