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Works with dual DP setups? #51

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psisquared opened this issue Jan 15, 2019 · 4 comments
Open

Works with dual DP setups? #51

psisquared opened this issue Jan 15, 2019 · 4 comments
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hwdebug depends on reporters hardware

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@psisquared
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psisquared commented Jan 15, 2019 •
edited

When I have my Dell UP2715k hooked up for 5k using its dual DP cable to two Thunderbolt 2 ports on a 2013 Mac Pro running 10.14.2, I can't get ddcctl to read or set brightness.

Dell's DDM monitor application works (looks like it also uses DDC/CI) with this dual DP setup in a Windows 10 Bootcamp install. And if I run the monitor in 4k on the Mac side with its single miniDP cable instead, ddcctl works great too.

Below is what I get running a debug install with the set and read brightness commands. I couldn't find any known issues with dual DP setups so I'm wondering if this limitation is already known or if there's any other output I can provide to help?

Great job BTW! Very cool to see this working when I used the single miniDP cable.

$ ddcctl -d 1 -b 50
2019-01-14 20:31:52.035 ddcctl[7327:988547] D: NSScreen #722475221 (2560x1440 0°) HiDPI
2019-01-14 20:31:52.035 ddcctl[7327:988547] I: found 1 external display
2019-01-14 20:31:52.036 ddcctl[7327:988547] I: polling display 1's EDID

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:14339 Serial:

2019-01-14 20:31:52.047 ddcctl[7327:988547] I: got edid.serial: F1JCM581085S
2019-01-14 20:31:52.048 ddcctl[7327:988547] I: got edid.name: DELL UP2715K
2019-01-14 20:31:52.048 ddcctl[7327:988547] D: action: b: 50
2019-01-14 20:31:52.048 ddcctl[7327:988547] D: setting VCP control #16 => 50

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:17695 Serial:

$ ddcctl -d 1 -b ?
2019-01-14 19:46:36.529 ddcctl[7108:899067] D: NSScreen #722475221 (2560x1440 0°) HiDPI
2019-01-14 19:46:36.529 ddcctl[7108:899067] I: found 1 external display
2019-01-14 19:46:36.529 ddcctl[7108:899067] I: polling display 1's EDID

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:17411 Serial:

2019-01-14 19:46:36.545 ddcctl[7108:899067] I: got edid.serial: F1JCM581085S
2019-01-14 19:46:36.545 ddcctl[7108:899067] I: got edid.name: DELL UP2715K
2019-01-14 19:46:36.545 ddcctl[7108:899067] D: action: b: ?
2019-01-14 19:46:36.545 ddcctl[7108:899067] D: querying VCP control: #16 =?

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:16683 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:14375 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:15911 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:14631 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:15655 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:15399 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:15143 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:14887 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:21799 Serial:

D: IOI2CTransactionTypes: 0x0f (15)
D: IOI2CNoTransactionType supported
D: IOI2CSimpleTransactionType supported
D: IOI2CDDCciReplyTransactionType supported
D: IOI2CCombinedTransactionType supported
E: IOI2CDisplayPortNativeTransactionType unsupported

Framebuffer: AMDFramebufferSI
IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/GFXB@3/IOPP/GFX2@0/ATY,IkuraS@5/AMDFramebufferSI/display0/AppleDisplay
VN:37036 PN:16566 SN:808990035 UN:5 IN:22055 Serial:

E: No data after 10 tries!
2019-01-14 19:46:37.323 ddcctl[7108:899067] E: DDC send command failed!
2019-01-14 19:46:37.323 ddcctl[7108:899067] E: VCP control #16 (0x10) = current: 0, max: 0
@chenfengfeng
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chenfengfeng commented Aug 21, 2019 •
edited

@psisquared hi,have you solved the problem of dual DP connection?
I run failed.

$ ddcctl -d 1 -b 100
D: NSScreen #722475472 (2560x1440 0°) HiDPI
I: found 1 external display
I: polling display 1's EDID
E: Failed to poll display!

@kfix
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kfix commented Sep 10, 2019

I have no access to 2xDP hardware, nor the little black trash can 🗑

I guess a log of it changing settings in the single-cable configuration might be useful.

and make frame buffers display list in both configurations @psisquared .

@kfix kfix added the hwdebug depends on reporters hardware label Sep 10, 2019
@Rastafabisch
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Rastafabisch commented May 1, 2020 •
edited

I experience a similar problem with the Philipps PHL 275P4V, which uses the same panel as the Dell. What does work however is pulling the EDID, including recognising the serial number. What does not work however is setting or reading any value (like brightness, volume, etc.). This said sending commands does. not fail for me, they just aren't respected be the monitor while running the Dual DisplayPort 5K mode, while they work fine in single cable 4K mode.

Is there anything I could do to troubleshoot or log?

--
For macOS Catalina für reading values quotes are required. ddcctl -d 1 -b "?"

@Rastafabisch
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Rastafabisch commented Sep 29, 2020 •
edited

I have no access to 2xDP hardware, nor the little black trash can 🗑
[…] make frame buffers display list in both configurations […].

I ran make framebuffers displaylist in either configuration now. I don't now wether the data reflects this but I apply the Dell 5K monitor edid using a .mtdd display override, as my Phillips which features the same panel as the Dell is not natively supported.

framebuffer_display_data.zip

The MacBook Pros internal display presumably is also included in either report.

@Rastafabisch Rastafabisch mentioned this issue Dec 2, 2020
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@kfix @psisquared @chenfengfeng @Rastafabisch