pastrychef
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- May 29, 2013
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Hey @Stork and @pastrychef I have finally gone up to Mojave now Avid have released the updated Pro Tools, and thought everything went smoother than any update I have done ever! However, now the ASmedia USB 3.1 Gen 2 ports only seem to be working at USB 2 speed, and I can't get them to work at full speed no matter what I do.
Problem is I am not entirely sure when I lost the higher speed. I have 2 USB3.0 drives that would both show up as 5gb/s under system profiler (and still do on the intel controller) in the past so I definitely had the full speed previously, but now all I get is 480mbs.
I have tried chucking out the SSDT I made and applying the latest port limit patch which gets clearly everything working as the internal lights show up again in system profiler but still the as media ports are stuck at USB 2 speed. I have double checked everything in the BIOS and all that appears correct. I have recently updated the BIOS to 1901 but the release notes mention nothing about USB changes, although they do for 1801, which has me wondering if maybe something then broke the way macOS sees the ports and I didn't notice till now?
This is driving me insane as I had them working and have no idea why they are not now. Could it be anything in a clover update? I made sure that and all my kexts were totally up to date before updating to Mojave. All I see is that the ASM2142 is native supported in macOS so have no idea why I have lost all my speed. Hopefully one of you may have some ideas to try. I am only using the red 'A' type port and not the Type C, but then I have only used this port and know for sure my drives would connect at 5gbs.
Your SSDT should not have any affect on the ASMedia USB ports. The SSDT should only deal with the Z370 chipset USB ports.
Also, do not trust what System Information > USB reports. It has been reporting the incorrect USB 3.1 gen 2 speeds for a long time and, as far as I know, has not been fixed.
I will test the ASMedia ports on my system a little later and report back...