Score:0

HP laptop not resuming properly from sleep

cn flag

On Kubuntu, resuming the laptop from sleep leaves me with a blank screen and the mouse only. The mouse moves normally which indicates that the touchpad is working. It once showed errors that the EXT4 partition is read only or something like that but I couldn't get it to show again. I suspect that the SSD is not resuming from sleep.

Laptop specs: Ryzen 5500U + Radeon GPU, 8GB RAM, Kioxia SSD. Software: Kubuntu 21.10, Plasma 5.22.4, Linux kernel 5.13

Score:0
cn flag

I booted the laptop from a live USB and suspended it then resumed. The laptop resumed properly but the SSD didn't show up, so referring to the logs I found:

nvme nvme0: Device not ready; aborting reset, CSTS=0x3
nvme nvme0: Removing after probe failure status: -19

Which turned out to be a known issue with some NVMe drives having broken sleep support. The solution (Quoting from arch wiki):

As a workaround, add the kernel parameter iommu=soft to use a software replacement for the hardware IOMMU. (For further details, see this documentation.) This has the potential to cause some slight processing overhead.

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