I follow back on this, the issue is back with this time a flickering external screen showing only briefly the moving part of the screen (horizontal band around the moving cursor etc..).
Ubuntu 25.04, linux 6.14.0-29-generic on DEll precision 5490, and Dell dock SD25TB4 with nvidia-driver-575-open. I tried multiple other nvidia driver without changes. I suspect a dock update, but i tried to revert it without success. Here are dock specs: ``` ├─SD25TB4: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock EC │ │ Current version: 1.0.6.3 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ Serial Number: [REDACTED] │ │ GUIDs: [REDACTED] ← USB\VID_413C&PID_B06E │ │ [REDACTED] ← USB\VID_413C&PID_B06E&DOCKTYPE_07&DEVTYPE_00 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Device stages updates │ │ • Device can recover flash failures │ │ • Device is usable for the duration of the update │ │ • Signed Payload │ │ • Can tag for emulation │ │ │ ├─LAN: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock LAN │ │ Current version: 2.27 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ GUID: [REDACTED] ← EC\DOCKTYPE_07&DEVTYPE_07 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Signed Payload │ │ │ ├─MST VMM8: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock MST │ │ Current version: 9.03.007 │ │ Bootloader Version: 0.0.000 │ │ Vendor: Dell Computer Corp. (USB:0x413C, SYNA:0x01) │ │ Install Duration: 40 seconds │ │ Serial Number: [REDACTED] │ │ GUIDs: [REDACTED] ← USB\VID_413C&PID_B0A5 │ │ [REDACTED] ← USB\VID_413C&PID_B0A5&BID_05 │ │ [REDACTED] ← USB\VID_413C&PID_B0A5&BID_05&CID_01 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Cryptographic hash verification is available │ │ • Device stages updates │ │ • Signed Payload │ │ • Can tag for emulation │ │ │ ├─PD: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock PowerDelivery │ │ Current version: 1.34.0.0 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ GUID: [REDACTED] ← EC\DOCKTYPE_07&DOCKSKU_02&DEVTYPE_01&INST_00 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Signed Payload │ │ │ ├─Package Version of Dell dock: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock Package │ │ Current version: 1.1.5.0 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ GUID: [REDACTED] ← EC\DOCKTYPE_07&DOCKSKU_02&DEVTYPE_PACKAGE │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Unsigned Payload │ │ Device Requests: • Message │ │ │ ├─RTS0 Gen 1 USB Hub: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock USB Hub │ │ Current version: 1.17 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ GUIDs: [REDACTED] ← USB\VID_413C&PID_B0A1 │ │ [REDACTED] ← USB\VID_413C&PID_B0A1&DOCKTYPE_07 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Signed Payload │ │ • Can tag for emulation │ │ │ ├─RTS0 Gen 2 USB Hub: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock USB Hub │ │ Current version: 1.15 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ Serial Number: [REDACTED] │ │ GUIDs: [REDACTED] ← USB\VID_413C&PID_B0A2 │ │ [REDACTED] ← USB\VID_413C&PID_B0A2&DOCKTYPE_07 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Signed Payload │ │ • Can tag for emulation │ │ │ ├─RTS5 Gen 2 USB Hub: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock USB Hub │ │ Current version: 1.22 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ GUIDs: [REDACTED] ← USB\VID_413C&PID_B0A3 │ │ [REDACTED] ← USB\VID_413C&PID_B0A3&DOCKTYPE_07 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Signed Payload │ │ • Can tag for emulation │ │ │ ├─Remote Management: │ │ Device ID: [REDACTED] │ │ Summary: Dell Dock Remote Management │ │ Current version: 1.9.3.0 │ │ Vendor: Dell Computer Corp. (USB:0x413C) │ │ Serial Number: [REDACTED] │ │ GUID: [REDACTED] ← USB\VID_413C&PID_B0A4 │ │ Device Flags: • Updatable │ │ • Supported on remote server │ │ • Signed Payload │ │ • Can tag for emulation │ │ │ └─USB4 controller: │ Device ID: [REDACTED] │ Summary: Dell Dock USB4 Controller │ Current version: 44.83 │ Vendor: Dell Computer Corp. (USB:0x8087, TBT:0x00D4, USB:0x413C) │ GUID: [REDACTED] ← TBT-00d4b0a1 │ Device Flags: • Updatable │ • Supported on remote server │ • Signed Payload │ • Can tag for emulation ``` -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2109692 Title: Failed automatic external monitor detection via Thunderbolt dock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2109692/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
