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Lenovo T470 OC Big Sur working except sound

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Not open for further replies.
Joined
Nov 16, 2020
Messages
16
Motherboard
p51
CPU
i7
Graphics
m2200/630
Hello all,

I am using the following EFI, which has battery, brightness/sound keys working along with intel lan, wifi, bluetooth.

Any advice how to troubleshoot audio with Realtek HD audio ?
I am familiar with adding removing kexts, but not with checking if this is matter of patching some files rather than just replacing some kexts.

Regards,
n.
 

Attachments

  • #6 EFI no sound.zip
    35.9 MB · Views: 314
  • t470hwa.jpg
    t470hwa.jpg
    189.5 KB · Views: 230
  • t470hwb.jpg
    t470hwb.jpg
    165.2 KB · Views: 216
Hello all,

I am using the following EFI, which has battery, brightness/sound keys working along with intel lan, wifi, bluetooth.

Any advice how to troubleshoot audio with Realtek HD audio ?
I am familiar with adding removing kexts, but not with checking if this is matter of patching some files rather than just replacing some kexts.

Regards,
n.
 
thanks i will go through that.
 
alcid=3 did the job :) external speakers are now ok, plug is still having issues, but i never use it anyway.

As soon as i figure out the dual battery thing i will post the final t470 EFI.
 
Hello septicc
Were you able to solve your problem ? You can publish your EFI folder
thank you
 
Everything works, except:
- the2nd battery which is not detected, so warning message is displayed early for plug or go to shutdown
- usb-c dock works problematic, only one display is possible at a time, either laptop monitor or an external.
 

Attachments

  • T470 no 2nd battery.part1.rar
    8 MB · Views: 234
  • T470 no 2nd battery.part2.rar
    8 MB · Views: 216
  • T470 no 2nd battery.part3.rar
    8 MB · Views: 202
  • T470 no 2nd battery.part4.rar
    2.7 MB · Views: 254
I've used your EFI and have added alcid=47 which made audio work for me, the battery is very buggy thou... any updates mate?
 

may be patching DSDt with X220 battery patch works, give a try mate. @septicc
 
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