24 ms·

Send it to Tim Cook email. It worked for me fixing DisplayPort DSC bug. After Catalina, later MacOSes lost ability to drive monitors at higher than 60Hz refresh

by nuker 6mo ago

Send it to Tim Cook email. It worked for me fixing DisplayPort DSC bug. After Catalina, later MacOSes lost ability to drive monitors at higher than 60Hz refresh. Apple support tortured me with all kinds of diagnostics, with WontFix few weeks later. Wrote email and it got fixed in Sonoma :) https://egpu.io/forums/mac-setup/4k144hz-no-longer-available-after-upgrade-to-big-sur/paged/10/ https://egpu.io/forums/mac-setup/4k144hz-no-longer-available...

arvinsim 6mo ago
Didn't know that. This probably explained why MacOS felt sluggish compared to my Windows PC even though I was using them on the same 144hz monitor.
nerdsniper 6mo ago
Thank you
FireBeyond 6mo ago
No, it didn’t get fully fixed. Fucking with DP 1.4 was how they managed to drive the ProDisplay XDR. If your monitor could downgrade to DP 1.2 you got better refresh rates than 1.4 (mine could do 95Hz SDR, 60Hz HDR, but if my monitor said it could only do 1.2, that went to 120/95 on Big Sur and above, when they could do 144Hz HDR with Catalina). I would be absolutely unsurprised if their fix was to lie to the monitor in negotiation if it was non-Apple and say that the GPU only supported 1.2, and further, I would be also unsurprised to learn that this is related to the current issue.
- nuker 6mo ago
  Ahh, true, I now have 120Hz top, but it's fine, why I said fixed :) I now recall in Catalina I had full 144Hz and VRR options! Monitor is Dell G3223Q via Caldigit TS4 DP.
  - FireBeyond 6mo ago
    I was using 2 27" LG 27GM950-Bs (IIRC), that could do up to 165Hz and VRR on a 2019 cheesegrater Mac Pro, wasn't the cables, or the monitors, or the card. People at the time were trying to figure out the math of "How did Apple manage to make 6K HDR work over that bandwidth?" and the answer was simply "by completely fucking the DP 1.4 DSC spec" (it was broken in Big Sur, which was released at the same time). The ProDisplay XDR worked great (for added irony, I ended up with one about a year later), but at the cost of Apple saying "we don't care how much money you've spent on your display hardware if you didn't spend it with us" (which tracks perfectly with, I think, Craig Federighi spending so much time and effort shooting down iMessage on Android and RCS for a long time saying, quote, "It would remove obstacles towards iPhone families being able to give their kids Android phones").
smcleod 6mo ago
I don't expect emails to get through to busy CEOs of huge companies like Apple unless you're really lucky and they make it through some automation, but I have dropped him an email just in case. I guess you never know.
- MikeNotThePope 6mo ago
  He has an army of people that would read his emails. A truly important one should get read. You could always try calling, too! I cold called Marc Benioff at Salesforce and he actually picked up the phone.
  - krackers 6mo ago
    This needs a story. What did you say to him?
    - harikb 6mo ago
      He was told, he had a call from Pope
      - not_your_vase 6mo ago
        Heh, classic Mike (not the Pope one)
    - MikeNotThePope 6mo ago
      This was maybe 20 years ago. I was looking for a job as a recruiter and just called him. He referred me to an HR rep and I did get an interview from it. Didn’t get the job, but hey, I got a shot!
- nuker 6mo ago
  Helps if there are support case numbers with attempted diags, maybe.
- sph 6mo ago
  Has anyone tried sending an email to Nadella telling him that Windows is terrible now? What if that was all it took.
extr 6mo ago
Just emailed him. Ridiculous issue.
jwong_ 6mo ago
I just upgraded from an M1 Pro to an m5 pro and lost the ability to drive my 4k monitor above 60hz on same dock and monitor setup. This was also going from Sequoia to Tahoe.

by nuker 6mo ago

arvinsim 6mo ago

Didn't know that. This probably explained why MacOS felt sluggish compared to my Windows PC even though I was using them on the same 144hz monitor.

nerdsniper 6mo ago

Thank you

FireBeyond 6mo ago

No, it didn’t get fully fixed. Fucking with DP 1.4 was how they managed to drive the ProDisplay XDR. If your monitor could downgrade to DP 1.2 you got better refresh rates than 1.4 (mine could do 95Hz SDR, 60Hz HDR, but if my monitor said it could only do 1.2, that went to 120/95 on Big Sur and above, when they could do 144Hz HDR with Catalina). I would be absolutely unsurprised if their fix was to lie to the monitor in negotiation if it was non-Apple and say that the GPU only supported 1.2, and further, I would be also unsurprised to learn that this is related to the current issue.

nuker 6mo ago
Ahh, true, I now have 120Hz top, but it's fine, why I said fixed :) I now recall in Catalina I had full 144Hz and VRR options! Monitor is Dell G3223Q via Caldigit TS4 DP.
- FireBeyond 6mo ago
  I was using 2 27" LG 27GM950-Bs (IIRC), that could do up to 165Hz and VRR on a 2019 cheesegrater Mac Pro, wasn't the cables, or the monitors, or the card. People at the time were trying to figure out the math of "How did Apple manage to make 6K HDR work over that bandwidth?" and the answer was simply "by completely fucking the DP 1.4 DSC spec" (it was broken in Big Sur, which was released at the same time). The ProDisplay XDR worked great (for added irony, I ended up with one about a year later), but at the cost of Apple saying "we don't care how much money you've spent on your display hardware if you didn't spend it with us" (which tracks perfectly with, I think, Craig Federighi spending so much time and effort shooting down iMessage on Android and RCS for a long time saying, quote, "It would remove obstacles towards iPhone families being able to give their kids Android phones").

smcleod 6mo ago

I don't expect emails to get through to busy CEOs of huge companies like Apple unless you're really lucky and they make it through some automation, but I have dropped him an email just in case. I guess you never know.

MikeNotThePope 6mo ago
He has an army of people that would read his emails. A truly important one should get read. You could always try calling, too! I cold called Marc Benioff at Salesforce and he actually picked up the phone.
- krackers 6mo ago
  This needs a story. What did you say to him?
  - harikb 6mo ago
    He was told, he had a call from Pope
    - not_your_vase 6mo ago
      Heh, classic Mike (not the Pope one)
  - MikeNotThePope 6mo ago
    This was maybe 20 years ago. I was looking for a job as a recruiter and just called him. He referred me to an HR rep and I did get an interview from it. Didn’t get the job, but hey, I got a shot!
nuker 6mo ago
Helps if there are support case numbers with attempted diags, maybe.
sph 6mo ago
Has anyone tried sending an email to Nadella telling him that Windows is terrible now? What if that was all it took.

extr 6mo ago

Just emailed him. Ridiculous issue.

jwong_ 6mo ago

I just upgraded from an M1 Pro to an m5 pro and lost the ability to drive my 4k monitor above 60hz on same dock and monitor setup. This was also going from Sequoia to Tahoe.