I'm brand new to Linux and recently installed Linux Mint 22.3 Cinnamon alongside Windows on a Lenovo ThinkPad T480. Whenever the laptop enters Suspend—either through the power menu or by closing the lid—it becomes completely unresponsive. The keyboard, power button, and TrackPoint do nothing, even though the pulsing power light indicates that the system is still suspended. The only recovery method is holding the power button to force a shutdown and then booting again.
The solutions I've found online mostly involve NVIDIA graphics, but this laptop uses integrated Intel UHD 620 graphics. What troubleshooting steps can I try to fix suspend and resume? System details: Intel Core i7, 32 GB RAM, 500 GB SSD shared with Windows, Linux Mint 22.3 64-bit, Cinnamon 6.6.9, and kernel 7.0.0-30-generic.
2 Answers
Suspend problems aren’t limited to NVIDIA hardware. Linux can expose firmware or ACPI issues with different sleep modes, and some laptops behave better with one sleep state than another. If disabling Intel PSR doesn’t help, check the system logs after a forced reboot for suspend/resume errors, and compare the available sleep states with `cat /sys/power/mem_sleep`. Keeping the laptop’s BIOS and firmware up to date is also worth trying.
On the T480 with Intel UHD 620 graphics, this is often related to the Intel i915 driver’s Panel Self-Refresh feature. Try disabling it as a test. Open a terminal and edit the GRUB configuration with:
sudo nano /etc/default/grub
Find the line beginning with GRUB_CMDLINE_LINUX_DEFAULT and add i915.enable_psr=0 inside the quotation marks. For example:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"
Save the file with Ctrl+O, press Enter, then exit with Ctrl+X. Apply the change using:
sudo update-grub
Then reboot and test Suspend again. If it fixes the problem, the display controller was likely hanging during resume.
Thanks! I’m very new to Linux—do I need to install GRUB first, or is it already part of the system?