the audio preblem

[findyy99]

Hi, I've tried .the newest release, the audio icon is gray at the beginning of the boot, And after a while, It will be normal.And, unfortunately, the plug problem is still there. English poor, Sorry! But, still thanks!

[surrogatecode]

(I am on a X1C so some things may behave differently from the T450)

Same here, the audio takes a while to come on after booting the system. However, it is working well after this brief delay.

The audio will also fail after a forced hibernation (running out of battery). I have no idea how to fix this, but it is a very unlikely scenario (hibernation).

The hissing was persistent even after the latest patch. ALC-pugin-fix is working, however only with manual activation. Installing it had seemingly no effect until it did just somehow magically fix itself (I suspect removing kexts from S/E/ and running them only via clover's other/ folder had an effect.)

[jsassu20]

are you usl=ing layout id 55? Try adding the bootarguement alcid=55

[surrogatecode]

Oh, I did not use any alc boot-argument, yet. Thanks.

I have added alcid=55, reboot, hissing. I have added alcid=55, removed the plugin, reboot, hissing.

I may be missing settings in the Clover Configurator. Looking into it, now.

[findyy99]

I did not use the additional boot-argument, yet. Thanks.

我还没有使用附加的 boot-argument，谢谢。

I have added alcid=55, reboot, hissing. I have removed the ALCPlugin, added alcid=55, reboot, hissing.

我已经移除了 ALCPlugin，增加了 alcid 55，重启，嘶嘶声。

I have tried just using alcid=layout-id to see if the boot-argument has any effect, which resulted in the audio driver not coming on, at all.

我只是尝试使用 alcid layout-id 来查看 boot-argument 是否有任何效果，这导致音频驱动程序根本无法启动。

It remains, that there is a hiss over the headphones most times, even with the ALCPuginFix installed. There is random moments, where the ALCPluginFix will work, but I do not know the cause of this, yet.

即使安装了 ALCPuginFix，大多数时候耳机上仍然会有嘶嘶声。 也有一些偶然的时刻，在这些时刻 ALCPluginFix 会工作，但是我还不知道原因。

I may be missing settings in the Clover Configurator. Looking into it, now.

我可能会失去三叶草配置器的设置。正在调查。

maybe you can like me, when you boot up, you can sleep manually, and you will find the hissing gone

[surrogatecode]

Yes, that may be why the hissing disappears sometimes. Still working on it.

[findyy99]

Yes, that may be why the hissing disappears sometimes. Still working on it.

have you tried the opencore repo?

[surrogatecode]

@jsassu20 I think, because I was using your initial config.plist as a starting point, the layout-id was set to 55 via Devices->Properties->PciRoot(0x0)/Pci(0x1b,0x0) already.

I have read more about AppleALC. The X1C3 (and T450?) is using the ALC292 codec (possible layout-id's 12, 18, 28, 32, 55). I have tried using layout-id 32, as it is specified as the layout for the T450s in the ALC292 info.plist.

result: layout-id 32, the audio-icon comes on immediately, i.e. driver seems to be loaded without delay. I have re-installed the ALCPluginFix and rebooted, headphones have worked without a hiss.

@jianzhao0806 No, I am not interested, yet. OpenCore is still experimental/work in progress and I want a stable system. I think I have fixed it, see above, try using "layout-id 32".

You need to change it via Clover Configurator or another plist-editor. Open you config.plist -> Devices -> Properties->PciRoot(0x0)/Pci(0x1b,0x0) -> layout-id, enter 32. Add the boot-argument alcid=32 just in case, but I do not think the boot-argument is needed.

[Nolivera007]

@surrogatecode send me your EFI folder, please I have a audio problem on thinkpad t450 Catalina.

[surrogatecode]

@Nolivera007 Hi Noe, I am not sure if the EFI folder will be of any help to you, as I am not running Catalina nor a T450. See above:

(I am on a X1C so some things may behave differently from the T450)

Keep in mind, the sound issues I encountered were less related to the general makeup of the EFI folder, and do not need a copy of the EFI folder per se. I essentially did three things. Also, the 3rd step is more of a hack. It works for me, with my configuration, on my laptop. It may have a very different outcome on your T450.

1. Make sure the ALC-Plugin-Fix properly starts after boot.
2. Edit the config.plist to have a working layout-id (easily done with Clover Configurator).
3. Remove all clover-related kexts from the EFI/CLOVER/kexts/System & S/L/E/

The EFI folder does not contain a config.plist, so please copy your config.plist into the EFI folder before rebooting!! You need to use your own config.plist to not lose your very own SMBIOS settings. -> https://we.tl/t-cOSZ2Vi9kz