On 04/23/2012 05:22 PM, Daniel Vetter wrote:
On Mon, Apr 23, 2012 at 05:06:53PM +0200, Carsten Emde wrote:
On 04/23/2012 04:22 PM, Daniel Vetter wrote:
On Mon, Apr 23, 2012 at 04:00:23PM +0200, Carsten Emde wrote:
[..]
The idea was to boot with kms and see whether any of these values would
restore the backlight. Writing to CTL1 should change anything in CTL2.
Ah, sorry, ok. Removed the quirk again and tested the various settings:
-> Initial screen: dark
# intel_reg_write 0x61250 0x80000000
Value before: 0xE0000000
Value after: 0x80000000
-> Still dark
# intel_reg_write 0x61250 0xa0000000
Value before: 0x80000000
Value after: 0xA0000000
-> Still dark
# intel_reg_write 0x61250 0x90000000
Value before: 0xA0000000
Value after: 0x90000000
-> BACKLIGHT ON!
# intel_reg_write 0x61250 0xb0000000
Value before: 0x90000000
Value after: 0xB0000000
-> Still ON.
Neat. Let's test two more:
# intel_reg_write 0x61250 0xd0000000
# intel_reg_write 0x61250 0xc0000000
Here we go.
-> Initial screen: dark
# intel_reg_write 0x61250 0xd0000000
Value before: 0xE0000000
Value after: 0xD0000000
-> BACKLIGHT ON!
# intel_reg_write 0x61250 0xc0000000
Value before: 0xD0000000
Value after: 0xC0000000
-> Dark again.
-Carsten.
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