Wi-Fi on the Yoga 9i 2-in-1 Gen 9 is handled by an Intel Wi-Fi 6E or 7 card, and the common problems are a lost driver, power saving and a router that mishandles the newer standards. If the Wi-Fi option disappears, check Device Manager for the adapter under Network adapters and reinstall the driver from Lenovo.
The checks in more detail
If it connects but drops, open the adapter's properties and untick the option that lets the computer turn the device off to save power, and set the Windows power mode to Balanced or Best performance. Try the 5 GHz band; the card supports 6 GHz on a router that offers it, but older routers may drop devices on mixed modes, so try a router firmware update. Forget the network and rejoin, restart the router and test on a phone hotspot to isolate the laptop from the router.
A Network reset in Windows rebuilds the adapters. If speed is the complaint and not drops, check which band you are on, since 2.4 GHz is slower than 5 GHz, and look at the link speed in the adapter's status. A convertible that is carried around the house passes between router coverage zones, so a mesh node near where you work helps more than any laptop setting. Convertible laptops have their antennas in the display lid or near the hinge, so the position of the screen affects the signal: in tent or tablet mode the antennas change orientation, and a laptop that drops Wi-Fi only in tablet mode is showing exactly that. Test in normal laptop mode, and avoid putting the laptop on a metal surface that shields the antennas.
Differential
Likely causes of “Lenovo Yoga 9i 2-in-1 Gen 9 will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
A missing driver
What separates it No Wi-Fi option
How to confirm Reinstall from Lenovo
- 2
Adapter power saving
What separates it It drops after idle
How to confirm Untick Allow the computer to turn off this device
- 3
Router mode or firmware
What separates it Drops on mixed bands or 6 GHz
How to confirm Update the router and try the 5 GHz band
- 4
A stale network profile
What separates it Connected but no internet
How to confirm Forget and rejoin
- 5
A card fault
What separates it Wi-Fi and Bluetooth both fail
How to confirm Contact Lenovo
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the adapter shows in Device Manager
- The band and router model
- Whether a hotspot works
- Whether Bluetooth fails too
Try in this order
0 of 11 completedCheck Device Manager
ReversibleLook for the wireless adapter.
Turn off adapter power saving
ReversibleIn the adapter's properties, Power Management.
Forget and rejoin the network
ReversibleIn Wi-Fi settings.
Try 5 GHz
ReversibleJoin the 5 GHz network by name.
Test on a phone hotspot
ReversibleTo isolate the router.
Reset the network
ReversibleSettings, Network and internet, Network reset.
Check the link speed
ReversibleIn Settings, Network and internet, Wi-Fi, your network, Properties, read the link speed and band.
Move closer or add a mesh node
ReversibleIf the speed is low far from the router, coverage is the cause.
Update the router firmware
ReversibleNewer Wi-Fi standards need current router firmware.
Test in laptop mode and tablet mode
ReversibleCompare the signal in each mode, because the antenna position changes.
Keep the laptop off metal surfaces
ReversibleA metal desk or tray shields the antennas.
Model-specific
What is true of this model and not of its siblings
- Power saving
- Windows can switch the adapter off.
- Hotspot test
- It separates laptop from router.
- Link speed
- The properties page shows the band and speed.
- Mesh
- A node where you work solves coverage better than settings.
- Roaming
- A laptop that moves between zones may hang on a weak node.
- Antennas in the lid
- Folding the screen changes the antennas' orientation.
Stop boundary
When this stops being a self-service repair
- !If Wi-Fi fails on all networks after a network reset, contact Lenovo
- !If only one router fails, ask its maker
- !A missing adapter after driver install needs service
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my Yoga 9i drop Wi-Fi?+
Power saving, router mode or a stale profile.
Does it support Wi-Fi 6E?+
The Gen 9 uses a modern Intel card.
Will a network reset help?+
Often.
Should I update the router?+
Yes, for new standards.
How do I see my Wi-Fi band?+
In the network's properties.
Does a mesh help a laptop?+
Yes, if coverage is the issue.
Why does Wi-Fi drop only in tablet mode?+
The antennas' orientation changes.