Summerbreeze

New HP Elitebook 850 G6.

• Issue: black screen when booting with the HP Thunderbolt dock G2

• Raising the laptop lid doesn't fix the issue, both screens are black.
• Seems to occur (more frequently) since the latest docking station firmware upgrade.
• Relevant post: https://community.spiceworks.com/topic/2255741-thunderbolt-dock-230w-g2-outboard-monitor-problems
• See also HP Thunderbolt Dock G2 Troubleshoot guide
• In particular:

• Disable Win 10 "Turn on fast startup (recommended)". Can be done via Control Panel or registry ([HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Power] "HiberbootEnabled"=dword:00000000)
• Update HP Thunderbolt Dock G2 firmware -> already done (through assistant).
• Update BIOS -> boot in BIOS, select update BIOS. Current BIOS was 1.5.03 (or something), upgraded to 1.6.

• ... problem seems to be fixed now.
• Let's re-enable the fast startup (maybe was still using an old G2 driver).
• ... Still having some issues. Unplug/Plug the docking seems to fix the issue, but I don't want to do that.
• DONE - Keep "HiberbootEnabled"=dword:00000000
• DONE - Checked FW again, and in fact the docking FW upgrade did fail. Try to reinstall... installed manually, now the installer reports that all components are up-to-date.
• DONE - Say that Fast Boot must be disabled in BIOS for pre-boot usage. Not sure if this is necessary, or what are the consequences...
• ... No more issues reported after several days... Issue is back after ~5 days.
• DONE - Using a HP monitor with DP native connection -> Still have the issue (immediately)
• DONE - Configure HP monitor. Disable DP low-power (set to always active). Disable auto-source. Set DP as default source.
• DONE - Still problem. Note we hear some sounds from windows (like device dis-/connecting) after some time of inactivity.
• DONE - Power option - when plugged in, don't turn off the screen anymore (currently, both sleep and screen off is disabled).
• ... let's see ...
• More possible alternative fixes:

• See Dock troubleshooting guide.
• See power options advanced (-> look at usb things, and many other).
• If not turning off the screen fix, see if we can recover standard pc sleep.

• HP support - History

• HP casenummer: 5055921964
• 20201028 - Installed the following updates

• Intel Video Driver and Control Panel V 27.20.100.8190
• HP Thunderbolt Dock G2 - Pilote audio
• Programme d'installation du micrologiciel HP Thunderbolt G2
• Mises à jour système essentielles pour Microsoft Windows 10
• BIOS V01.06.00

• 20201028 - In BIOS, disable Fast Boot, check that Thunderbold mode is not on security mode.
• 20201028 - Set Power screen/PC sleep to 1min / 2min.
• 20201029 - Set Power screen/PC sleep to 10min / 15min.
• 20201030 - Switch back to Samsung HDMI monitor.
• 20201103 - Monitor not waking up (PC woken up with mouse). Going to sleep then wake up again (with docking button) fixed the issue.
• 20201104 - Monitor not waking up (PC woken up ???). Going to sleep then wake up again (with docking button) fixed the issue.
• 20201104 - Switch to HP E231 DP monitor.
• 20201104 - Monitor not waking up, although PC not sleeping (also, heard many "beep" like disconnection of device). Fix is to disconnect/connect thunderbolt cable.
• 20201104 - Restart PC.