vgabios_before.bin - SHA1 checksum: e4d320eb278b0118c46e2e470e7154b12c41966d
vgabios__after.bin - SHA1 checksum: a9e2ed569bbaaea283b5380a5f6c44fc4efc3da4
And here is a report about 3 bytes difference between them - http://www.diffnow.com/?report=2kwq3
P.S. What if your backlight problem could be related to manufacturer/model of LCD panel? For the reference, my panel is Samsung LTN156AT30L01 ( SDC Model 4652 ) which is working perfectly
On 4 April 2015 at 13:08, Vladimir <quickcracktime <at> gmail.com
> Very sorry to hear that your LCD backlight problem is not resolved yet!
> Are you confident that LCD backlight is not faulty, and have you tried
> reinstalling coreboot?
> If answer for both questions is "yes", then you could try these two advices:
> 1) Redownload a source code of coreboot from github, compile it and flash
> again to your G505s.
> Since your last try - at the end of January - there were 5 commits to
> "coreboot/src/mainboard/lenovo/g505s" branch,
> and also some commits to the common branches, changes that affect all the
> mainboards supported by coreboot.
> Maybe your issue will be resolved if you would try coreboot again, with
> latest sources!
> 2) If 1st advice doesn't work, you could open
> "coreboot/src/mainboard/lenovo/g505s/buildOpts.c" file
> (which is the only file from G505s branch that has a reference to "LCD")
> Go to line 158, try to change the "#define BLDCFG_CFG_LCD_BACK_LIGHT_CONTROL
> 200" parameter.
> Default value seems to be 200 for most platforms, but you could try setting
> it to 0. Then compile & flash again
> === Any advices from experienced coreboot members would be very welcome! ===
> On 3 April 2015 at 17:46, 1 1 <zilogpnz <at> gmail.com
>> No. I not solved this problem.
>> 2015-04-03 17:08 GMT+04:00 Vladimir <quickcracktime <at> gmail.com
>>> > On Mon Jan 26 13:07:42 CET 2015 zilogpnz wrote:
>>> >> I'm trying to run Coreboot on Lenovo G505s and have a problem:
>>> >> - backlight of LCD is not turn on. But on the external LCD (by CRT
>>> >> connector) is all good.
>>> >> Could you help me with a solution to this problem?
>>> Sorry for such a long reply, but what is a current status of this
>>> Have you resolved the LCD backlight problem with your G505s - and, if
>>> yes, how?