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Full range of brightness using ACPIBacklight

RehabMan

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I usually use 90% brightness, and I'm satisfied with value in your 4540s patch. I think only 2 problems remain are: different levels before/after sleep and save brightness setting to nvram.

Next week, ... I hope to have it all done... We'll see.

Side note: HD4400/HD4600 is different. This technique stops with HD4000...
 

RehabMan

Moderator
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188,161
Motherboard
Intel DH67BL
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FYI: I noticed that on battery, my 4530s boots up to OS X with black screen (brightness at lowest level) and I need to hit the brightness up key once. This will be solved by save/restore from nvram though...
 
Joined
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HP Elitebook 8470p
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Intel Core i5 3320M
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RehabMan

Moderator
Joined
May 3, 2012
Messages
188,161
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
Joined
Nov 24, 2012
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Motherboard
HP Probook 6470b
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Intel Core i5-3320M
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- for example, my BAR1 address is 0xd4000004, so adding 4824c, we have 0xd4048250
- view the memory as 32-bit dwords
- now you can see the 0x80000000 in the first dword at 0xd4048250 and the brightness value at 0xd4048254
I am stuck here, must be doing something silly...
my BAR1: 0xD4000004But I don't know where to locate the 0xd4048250?
 
Joined
Nov 24, 2012
Messages
631
Motherboard
HP Probook 6470b
CPU
Intel Core i5-3320M
Graphics
Intel HD 4000, 1600x900
Mac
Classic Mac
Mobile Phone

RehabMan

Moderator
Joined
May 3, 2012
Messages
188,161
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
Thx, missed that one.
So my range is 21 values + black, like the 4530S interestingly:
0xDA, 0xF5, 0x11E, 0x148, 0x17E, 0x1B5, 0x1F9, 0x24B, 0x29D, 0x30B, 0x378, 0x3F3, 0x47C, 0x512, 0x5B7, 0x676, 0x743, 0x847, 0x958, 0xB69, 0xD83

Interesting that your HD4000 has the same values as does the 4530s with HD3000. Seems like it might be more related to how the BIOS initializes the brightness levels... or something else...
 
Joined
Oct 22, 2012
Messages
3,476
Motherboard
HP Elitebook 8470p
CPU
Intel Core i5 3320M
Graphics
Intel HD 4000, 1600x900
Mobile Phone
  1. iOS
Interesting that your HD4000 has the same values as does the 4530s with HD3000. Seems like it might be more related to how the BIOS initializes the brightness levels... or something else...

I believe that HP 6470b and 8470p can share the same mainboard.
 
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