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8623
March 9th, 2021 01:00
BIOS error "Thunderbolt PCIe Device Enumeration mode has switched to BIOS assist mode"
Since I updated my BIOS and Thunderbolt firmware last week, I get this popup for a second on EVERY reboot, after the popup, the system reboots itself and goes to Windows.
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This support article says: "The message will only appear one time and there is no functional impact to system performance."
- That is not true.
- The popup flashes at EVERY reboot.
- Boot time seems slower.
- USB flash drives connected to the Thunderbolt port often can not be safely removed (Ejected) in Windows as they appear to be in use, while they are not.
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- Device: Dell G5 15 5587
- OS: Windows 10 Pro 1909
Popup error started after installing these updates on the same day (02 March 2021)
- BIOS 1.15.0 (15 Jan 2021)
- Intel Thunderbolt Firmware Update 4.46.152.001, A02 (21 Jan 2021)
- Intel Management Engine Interface Driver 2036.15.0.1835, A07 (13 Jan 2021)
- Intel HD Graphics Driver 27.20.100.8935, A07 (29 Jan 2021)
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Please advice how to go back to previous Thunderbolt firmware.
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Beefesoft
1 Rookie
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24 Posts
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March 10th, 2021 00:00
Update:
I went to Thunderbolt Auto Switch in BIOS and enabled "Auto Switch" (was off by default) and don't get the flashing popup and double restart anymore.
DELL-Cares
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27.7K Posts
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March 9th, 2021 02:00
Hi,I see you’re looking for technical assistance. If you require our help, you could initiate a private/direct message along with service tag with us, and we’d be glad to assist you.
DELL-Cares
Moderator
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27.7K Posts
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286 Points
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March 9th, 2021 02:00
Hi,I see you’re looking for technical assistance. If you require our help, you could initiate a private/direct message with us, and we’d be glad to assist you.
Sugam vars
2 Posts
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June 9th, 2021 04:00
solution not working still the same popup on every reboot..dell g7
marlonhiram12
1 Message
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October 14th, 2021 07:00
I can't find this configuration in the BIOS, I have a Precision 7550 and this popup message appears in every reboot. It affects in the boot time, can u guys help me with this?