ckmcsk Posted December 14, 2015 Share Posted December 14, 2015 hi to all Guru i have given up trying after been spending so many hours or reading and trying out. what is my problem now... i have a dell inspiron 17 7746 series with i5-5200 and HD5500 i managed to get both yosemite and el capitan installed and get sound working. I faced the one atypical issue... HD5500 7mb no kext load At first I had the error of "...unable to register framebuffer driver..." but the OS still successfully loaded with flickering screen for password login. then I patched AppleIntelBDWGraphicsFramebuffer (​39CF763C to 39CF773C). No more "..unable to register framebuffer..." but the screen is still flickering for password and the graphic still remained as 7mb..and no acceleration. I also used clover to InjectIntel = True and ig-platform-id=0x16160002. I also tried 0x16160006 but the result still the same... what did I do wrong.... it is sleepless days and nights.. Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 14, 2015 Moderators Share Posted December 14, 2015 Have you try different ig-platform-id? 0x16260006 works better on my E7450 with HD5500. Have you try modding the DVMT in the Bios? The patch you use above is for Yosemite only, is that what you installed? HD5500 works better with El Capitan...no hanging issue like on Yosemite. Link to comment Share on other sites More sharing options...
ckmcsk Posted December 14, 2015 Author Share Posted December 14, 2015 hi, thx for your response. there is no bios change for the DVMT... but window report that the memory is 128mb. so do i still require to do so? with regards to the ig-platform-id, i tried 1616002, 1616006 and 16268086. all similar results. i do not face hanging issue but it is the graphic card hd5500 no acceleration..only 7mb. can you advise me further Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 14, 2015 Moderators Share Posted December 14, 2015 What Windows report is not reliable. You should check the BIOS. See my guide on E7450. You need to set the DVMT to 96MB (0x3). The var might be different on your BIOS than mine so don't rely on it but use it as a reference. So are you on Yosemite? Link to comment Share on other sites More sharing options...
ckmcsk Posted December 19, 2015 Author Share Posted December 19, 2015 i tried to use setup_var to make the mod. but i afraid did not get the preallot changed. it said error : offset is out of range?? I have two variables: 0x228 and 0x229 Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 19, 2015 Moderators Share Posted December 19, 2015 It could be that your BIOS is locked. Upload your Config file and DSDT/SSDT, I'll examine them. Link to comment Share on other sites More sharing options...
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