DELL U4924DW - videoswap/usbswitch about ddcutil HOT 7 CLOSED

1. Try using --noverify on the setvcp command. Features xE5 and xE7 may be write-only. As they are manufacturer-specific features and not in the MCCS spec, ddcutil has no way of knowing that they are write-only.

2. If your monitor supports feature xCA (OSD/Button Control) it may be possible to re-enable the OSD using that feature. See ddcutil vcpinfo ca --verbose for values. (If the VCP version of your monitor is 2.2, the high order byte (SH) of the value is used for extended button control. See the MCCS spec for details.)

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Thx for your answer. With --noverify return value is 0 and I don't get an error message.
Regarding ddcutil vcpinfo ca --verbose:

VCP code CA: OSD/Button Control
Sets and indicates the current operational state of OSD (and buttons in v2.2)
MCCS versions: 2.0, 2.1, 3.0, 2.2
MCCS specification groups: Control, Miscellaneous
ddcutil feature subsets:
Attributes (v2.0): Read Write, Non-Continuous (simple)
Attributes (v2.1): Read Write, Non-Continuous (simple)
Attributes (v3.0): Read Write, Non-Continuous (simple)
Attributes (v2.2): Read Write, Non-Continuous (complex)
Simple NC values:
0x01: OSD Disabled
0x02: OSD Enabled
0xff: Display cannot supply this information
Simple NC values:
0x01: OSD Disabled
0x02: OSD Enabled
0xff: Display cannot supply this information

So what would be the correct command to reenable osd?

TIA.
Bye.
Michael

from ddcutil.

ddcutil setvcp ca 2

from ddcutil.

Doesn't help - osd still can't be activated after setting 0xe5/0xe7.
Besides that "ddcutil getvcp 0xca" already returns 0x02, so osd should be active.

from ddcutil.

0xe7 is working without problems, only 0xe5 leads to the osd problem.
Besides that, 0xe5 seems to destabilize the ucb-c connection. A few times the monitor lost the connection to the notebook connected via usb-c.

from ddcutil.

It seems to be a timing problem - if I wait for 2 seconds between the two setvcp commands, everything is ok: OSD menu can be activated and no usb-c problems so far.

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Works for me.

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