Windows 10: Driver IRLQ not Less or Equal - L1C63x64.sys

A couple of times a week my computer will freeze and the audio goes go into a loop, followed by a BSOD showing DRIVER_IRQL_NOT_LESS_OR_EQUAL blaming L1C63x64.sys (Atheros LAN). This generally happens when playing games, though I've had it once or twice while just watching a video. I've tried updating my LAN drivers but I'm having trouble finding any that are for Windows 10.

Crash logs are attached. The first one is from the [BETA] BSOD Inspector, and the second one (ending in 96.zip) is from the official dm_log_collector in the stickied thread in this forum section. Thanks.

:)

 

Driver IRQL not less or equal L1C63x64.sys

Hey,

I had issues with a third-party software (and drivers) from Juniper. I remember I uninstalled and removed everything related to those drivers on my computer and it helped a lot.

But in the end, I still downgraded to Windows 7 (for other unrelated issues).

But thanks for the answe!

 

Driver IRQL not less or equal L1C63x64.sys

Hello,



Welcome to Microsoft Community. I appreciate your efforts towards resolving the issue. I will certainly help you with the issue that you are facing.

This issue arises due to a driver failure, conflict or incompatible driver on the system.

Try the following methods and diagnose this issue further.

Method 1: Safe Mode

Step 1:

To start Windows 10 in safe mode:

1. Search for Settings from the taskbar and select it from the search results.

2. Select
Update & security and click on Recovery.

3. Go to
Advanced startup and select Restart now.

4. After your PC restarts to the Choose an option screen, select
Troubleshoot > Advanced options > Startup Settings >Restart.

5. After your PC restarts, select a startup setting as Safe Mode with Networking by pressing the corresponding number.

If the issue does not persists in Safe Mode with Networking, then perform a Clean Boot to check if any third party application is causing the issue, as Clean Boot helps in eliminating software conflicts.

Step 2

Put the computer in Clean Boot and check if it helps.

By setting your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue.

How to perform a Clean Boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8

http://support.microsoft.com/kb/929135

Note: After Clean Boot troubleshooting step, refer to “How to reset the computer to start as usual after troubleshooting with Clean Boot” from the article.



Method 2: Run the System File Checker tool (SFC.exe)

System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. It will scan your system files and to repair missing or corrupted system files in Windows.
To run the SFC scan, refer to the Microsoft article below.

http://support.microsoft.com/kb/929833





Method 3:

Update Drivers

Refer to the following article and update all the drivers available.

How to: Install and Update drivers in Windows
10



If you are unable to find the drivers for Windows 10, you may try to
install the drivers in compatibility mode with Windows 8.1.



Firstly download the driver from your computer's manufacturer website and then install it.

Refer (Make older programs compatible with this version of Windows)

http://windows.microsoft.com/en-US/windows-8/older-programs-compatible-version-windows

Note: This link also applies to Windows 10.



Hope this information is helpful.



Please do let us know if you need further assistance with Windows, we will be glad to assist you.

 

Hi kryo,

Welcome to the 10forums.

The LAN driver needs updating for now, try a driver that is as recent as possible.
Code: 7: kd> lmvm L1C63x64start end module name fffff801`77480000 fffff801`774a2000 L1C63x64 T (no symbols) Loaded symbol image file: L1C63x64.sys Image path: \SystemRoot\System32\drivers\L1C63x64.sys Image name: L1C63x64.sys Timestamp: Mon Apr 01 05:15:17 2013 (5158FBC5) CheckSum: 000245C4 ImageSize: 00022000 Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4[/quote] I've also seen another driver that is causing trouble, the Intel Graphics driver.
It might need updating too.
Code: 5: kd> lmvm igdkmd64start end module name fffff801`00000000 fffff801`0063d000 igdkmd64 T (no symbols) Loaded symbol image file: igdkmd64.sys Image path: igdkmd64.sys Image name: igdkmd64.sys Timestamp: Sat Jul 18 02:27:57 2015 (55A99D8D) CheckSum: 0061C20F ImageSize: 0063D000 Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4[/quote] Please keep in mind, I wasn't able to read all of the dump files you provided so my analyse might not be complete. (It is most likely a problem from my side.)

Please fill in your system specsPlease go to this site and download the tool. The tool will give you detailed information about your system specs, please fill in your system specs more completely.How to fill in your system specs:

 

Thanks, will look for some updated drivers and I've filled in my system specs

 

Blue screen still happens. I have updated my intel graphics drivers, and still cannot find any newer better drivers for LAN (device is Qualcomm Atheros AR8171/8175). Attached a new zip file with updated driver info.

I am not sure if this is related, but I almost always get this BSoD while playing games, and this time I checked the CPU temp after rebooting and all the cores were 100C... My laptop (Lenovo y510p) suffers from terrible engineering and after a couple years of use the temperatures have really gotten quite bad. Although my processor does underclock itself if it detects that the temperature is too high, I think it's plausible that it's shutting down automatically because of heat.

Edit: I actually managed to find a LAN driver on a sketchy looking website but it seems to work ok. I will edit this post with a new zip file if the bluescreen happens again. However, after reading more online it seems likely to me that overheating is causing the BSoD.

 

Please reset driver verifier

To reset driver verifier, open an admin command prompt and copy/paste "verifier /reset" (without quotes)

The cause is your LAN driver, please check for windows 10 compatible driver updates here

To test if your CPU has been damaged due to overheating





Diagnostic Test

CPU TEST


Run Prime95 - Stress Test Your CPU - Windows 10 Forums



Warning Your CPU temperatures will rise quickly while under this stress test. Keep a keen eye on them and abort the test if overheating occurs.

To get the temperature down

• Replace the thermal paste on your CPU,
• Clean the heatsink and the fans with compressed air.

This might help with the temperature of the CPU. If you don't know how to replace the thermal paste, please let a professional do this to prevent any hardware damage.

 

I finally found a LAN driver here (atheros.cz gives a 404 for my device). I also updated my nvidia graphics driver. I have attached the latest DM Log.

I tried running prime95 but it would not raise my CPU temp above 90C. I think the issue with my laptop is that the CPU and GPU share the heatsink and fan, so the computer only overheats if they are both under heavy load. Therefore I downloaded FurMark and ran both the CPU and GPU stress tests included for 10-20 minutes, reaching a max temperature of 95C. At this point the stress test application crashed and I got a message from nvidia saying something about a "kernel error" and that the application needed to close. I am looking into getting the thermal paste renewed. Thank you for your help.

 

Please upload a new zip file, the attached zip file is empty

 

Very strange.... it sure took a long time to generate that empty zip file

 

The cause is the LAN driver, it still needs updating
Please check Atheros or Qualcomm (scroll down for product support) for updates

Code: 2: kd> lmvm L1C63x64start end module name fffff800`d6dd0000 fffff800`d6df3000 L1C63x64 T (no symbols) Loaded symbol image file: L1C63x64.sys Image path: L1C63x64.sys Image name: L1C63x64.sys Timestamp: Tue Jul 16 08:56:31 2013 (51E4EE9F) CheckSum: 0002426B ImageSize: 00023000 Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4[/quote]

 

According to atheros.cz the latest drivers for my device are from 2013-08-09 [August '13], when I try to download them I get a 404 page: Drivers for Atheros AR8171 and Windows 8

The Qualcomm site does not have drivers.

 

Forgot that, sorry.

Check manufacturer of your mainboard for drivers.

 

Manufacturer site says latest LAN driver is from 10/16/2013 but I installed it and device manager says it's 2013-07-16.
Attached latest DM Log.

 

Please try a different working cable for the internet connection to test if it is the cable that causes trouble or the LAN port.