Hi,

as Redhat and Ubuntu offered versions for T520, 4239-25x, (have a look at https://pcsupport.lenovo.com/de/de/solutions/pd031426#2), maybe there is a solution for my hardware too. An extract from /var/log/messages

---begin---
kernel: [ 5.307562] ACPI Warning: SystemIO range 0x0000000000000428-0x000000000000042F conflicts with OpRegion 0x0000000000000400-0x000000000000047F (\_SB_.PCI0.LPC_.PMIO) (20150930/utaddress-254)
kernel: [ 5.307573] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
kernel: [ 5.307580] ACPI Warning:
kernel: [ 5.307582] SystemIO range 0x0000000000000540-0x000000000000054F conflicts with OpRegion 0x0000000000000500-0x000000000000057F (\_SB_.PCI0.LPC_.LPIO) (20150930/utaddress-254)
kernel: [ 5.307584] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
kernel: [ 5.308038] ACPI Warning: SystemIO range 0x0000000000000530-0x000000000000053F conflicts with OpRegion 0x0000000000000500-0x000000000000057F (\_SB_.PCI0.LPC_.LPIO) (20150930/utaddress-254)
kernel: [ 5.308039] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
kernel: [ 5.308043] ACPI Warning: SystemIO range 0x0000000000000500-0x000000000000052F conflicts with OpRegion 0x0000000000000500-0x000000000000057F (\_SB_.PCI0.LPC_.LPIO) (20150930/utaddress-254)
kernel: [ 5.308043] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
kernel: [ 5.308044] lpc_ich: Resource conflict(s) found affecting gpio_ich
---end---

Hostinfo

Distribution: SUSE Linux Enterprise Desktop 12
-Service Pack: 3
Architecture: x86_64
Kernel Version: 4.4.114-94.11-default
-Installed: Tue Jan 16 20:36:32 2018Sun Feb 25 12:25:43 2018
-Status: Tainted: N
Last Updated Package: Sun Feb 25 12:26:48 2018
-Patches Needed: 0
-Security: 0
-3rd Party Packages: 68

Do you think there is a chance to fix the problem?

Regards

Gnter