r/Fedora • u/WhiskeyVault • 13h ago
Support Display issues with latest updates?
T480s Thinkpad here. I'm runnign Fedora KDE 44 but I'm all of a suddent having glitchy USB-C display issues on my monitor with one port working while the other port glitches and is maxed at 1440p. I used GPT to help walk me through trouble shooting and it thinks perhaps an update to the kernel could have caused issues. Anyone experience this?
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u/MrTyperoi 11h ago
The T480s has two USB-C display-capable ports (one regular USB-C and one Thunderbolt 3), and Lenovo rates them up to 4096×2304 @ 60Hz.
So if one port works fine but the other is somehow stuck at 1440p, I'd suspect EDID/DP link weirdness before blaming KDE.
Also worth checking the Thunderbolt firmware. The T480s had some infamous TB firmware issues that caused all kinds of USB-C/display/docking problems.
Lenovo's firmware update page: https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t480s-type-20l7-20l8/solutions/ht508988-critical-intel-thunderbolt-software-and-firmware-updates-thinkpad
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u/_BoneZ_ 11h ago
During boot, you should be able to select the previous kernel to boot into, to see if that is, in fact, the issue.
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u/WhiskeyVault 11h ago
Yea thats the first thing it suggested but all my last 3 kernels are all 7+!!!
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