Arch Linux

BrunoPT

Member

From: Portugal

Registered: 2013-11-19

Posts: 28

Laptop Hangs at boot - *ERROR* Unclaimed register detected.

I have a Dell Inspiron 17R 5737 laptop and I am getting issues with it using Linux.

When I try to turn on the computer sometimes I get this message:
[drm:hsw_unclaimed_reg_detect.isra.11 [i915]] *ERROR* Unclaimed register detected. Please use the i915.mmio_debug=1 to debug this problem.

If this message shows up the computer freezes right after loading the SDDM, then if I press caps lock it switches the LED, but if I press Ctrl+F1,F2,F3... it frozes completely.

The strange thing is that if this message doesn't appear all works fine.

Can somebody help me to solve this strange issue?

I can't post a dmesg when it gives the error but there it is a dmesg after a sucessfull boot:
http://dpaste.com/1BGACTE

EDIT: After installing linux-lts kernel I can boot "normaly", sometimes the error arises but the system continues the boot and doesn't freeze

Last edited by BrunoPT (2015-03-26 02:28:23)

nullified

Member

From: Massachusetts, USA

Registered: 2013-12-09

Posts: 468

Re: Laptop Hangs at boot - *ERROR* Unclaimed register detected.

The error itself is giving you advice. Have you done what it suggests?

---

"We may say most aptly, that the Analytical Engine weaves algebraical patterns just as the Jacquard-loom weaves flowers and leaves." - Ada Lovelace

BrunoPT

Member

From: Portugal

Registered: 2013-11-19

Posts: 28

Re: Laptop Hangs at boot - *ERROR* Unclaimed register detected.

Yes, I also tried to use nomodeset, it does nothing.

MoonSwan

Member

From: Great White North

Registered: 2008-01-23

Posts: 881

Re: Laptop Hangs at boot - *ERROR* Unclaimed register detected.

Perhaps the drivers are corrupted?  Unistall and re-install the i915 driver?

BrunoPT

Member

From: Portugal

Registered: 2013-11-19

Posts: 28

Re: Laptop Hangs at boot - *ERROR* Unclaimed register detected.

Perhaps the drivers are corrupted?  Unistall and re-install the i915 driver?

Just did that, the error continues to appear.

I've also added i915.semaphores=1 to kernel parameters activated early kms of the module i915.

Last edited by BrunoPT (2015-03-26 00:19:10)