Hello,

I have been using the licensed version of DisplayFusion for many years without crashes on my computer running Windows 10. DisplayFusion began crashing immediately after upgrading from v12.0.2 to v12.1. The crashes continued after upgrading to v12.1.1. The crashes are repeatable. Reliability Monitor shows multiple crashes beginning on the day I upgraded to v12.1.

WinDbg analysis of application dumps from both v12.1.0 and v12.1.1 produced the same Failure Bucket ID and identical Failure Hash {4f335f13-e945-3e5a-08b5-ab793970a677}, and reports the exception occurring in coreclr.dll!ProcessCLRException+0x13f with an access violation (0xC0000005). I have seven Windows Error Reporting (WER) full-memory application dumps and can provide one or more of them if they would be helpful. Please let me know if you would like me to provide one or more of the WER dump files or provide additional WinDbg output. They vary in size from 533MB to 1.32GB, which even Zipped will exceed the 50MB attacment limit. I can provide a Dropbox Link.

DisplayFusion v12.0.2 was stable on this system for months prior to upgrading to v12.1.

Details from the most recent crash:

Windows 10 Pro 22H2 (19045)
.NET Runtime 10.0.10

Faulting application: DisplayFusion.exe
DisplayFusion version: 12.1.1.0

Faulting module: coreclr.dll
Module version: 10.0.1026.32716

Exception code: 0xC0000005 (Access Violation)

Failure Bucket:
INVALID_POINTER_READ_c0000005_coreclr.dll!ProcessCLRException

Failure Hash:
{4f335f13-e945-3e5a-08b5-ab793970a677}

Yes. In fact, DisplayFusion crashed again today. The Dump file is 926MB. I tried compressing it into a RAR file and a ZIP file but both exceed your 50MB file upload limit, so I copied the latest Dump file into a Dropbox folder. The link is below. It will expire in one week. I have 7 more Dump files. If you would like to look at the others, let me know and I will copy them to the Dropbox folder. I tested this link and it works, but please let me know if you have any trouble downloading the Dump file.

https://www.dropbox.com/scl/fo/djwmcapnrwfdbt0fwgqc2/AHBfbGkpthtt7dNeNbYT3tg?rlkey=0ljihkonxecx495x367rgwbjt&st=q91hjd1y&dl=0

Thanks

Thank you. I misspoke in my last post. The latest crash Dump file was generated on 03-August, not 04-August. I thought it crashed yesterday (04-August) because midday yesterday I noticed that my DisplayFusion multi-monitor task bars were gone and DisplayFusion was not running. I restarted DisplayFusion and it’s been fine since then. Whatever happened yesterday (04-August) did not generate a Dump file, and the Windows Reliability Monitor did not record a DisplayFusion crash on 04-August. It did report a crash on 03-August. That crash is what generated the Dump file in the Dropbox folder.

Hi again. DisplayFusion v12.1.1 crashed again this evening. I rebooted after a day of heavy computer use and when the reboot was complete, DisplayFusion was not running. The Reliability Monitor recorded another crash and there was a new Dump file. I copied it to the Dropbox folder that I provided a link to in case your Devs want to look at the most recent crash Dump file.

DisplayFusion has crashed one more time since my lsat post. I do run Windhawk. I will shut it down and prevent it from starting automatically and see if the DisplayFusion crashes stop. If they do, does this mean I cannot run Windhawk and DisplayFusion? Windhawk offers a bunch of Windows mods, mostly for Windows 11. I am running Windows 10 v22H2 Build 19045.7548 and only have 3 Windhawk mods running. They are "Better file sizes in Explorer Details", "Explorer Up → New Window/Tab Cntrl-click on explorer up-button opens parent in a new window or tab", and "Modernize Folder Picker Dialog". Does your dev team know if 1 of these 3 Windhawk mods is causing DisplayFusion to crash?

Many thanks for your support!

One other potentially relevant finding: I had also been experiencing intermittent Event Viewer freezes. I captured a user-mode dump of mmc.exe while Event Viewer was actually frozen and analyzed it in WinDbg. The MMC UI thread was blocked in a synchronous COM/RPC call involving UIAutomationCore/MSAA focus handling (get_accFocus, GetFocusedChild, etc.).

Running lmv m AppHook64* on that dump showed the DisplayFusion 12.1.1 application hook loaded in the frozen MMC process:

C:\Program Files (x86)\DisplayFusion\Hooks\AppHook64_3418A085-A63A-458D-9353-8B7E894A2778.dll

I then added both C:\Windows\System32\mmc.exe and C:\Windows\SysWOW64\mmc.exe to DisplayFusion Compatibility and enabled "Disable Application Hooks (this application only)". Event Viewer has not frozen since making that change.

I realize this does not by itself prove the DisplayFusion hook was the root cause, but the combination of the hang-dump stack, the DisplayFusion hook being loaded in the frozen process, and the freezes stopping after disabling the hook for MMC seemed worth mentioning.

Yes I plan to leave the mmc.exe hooks disabled in DisplayFusion, at least until the crashing issue is resolved. DisplayFusion crashed again today. This is the first time it has crashed since I disabled Windhawk 2 days ago. I copied today's Dump file into the shared Dropbox folder. Its the one dated today. I appreciate the efforts to figure out what is causing DisplayFusion v12.1.0 and v12.1.1 to crash on my Windows 10 system.

Apologies. I guess setting a 1 week link expiration was a poor choice. The new link below is good for a month. DisplayFusion crashed again last night. I put that Dump file in the shared folder as well. Windhawk is still not running. Many thanks for your continued support.

https://www.dropbox.com/scl/fo/djwmcapnrwfdbt0fwgqc2/AHBfbGkpthtt7dNeNbYT3tg?rlkey=8iuv8k81tk06mxy7osc2wsvql&st=4apn0bod&dl=0

Thank you. I just put the latest Dump file from 17-August in the shared Dropbox folder in case you want to analyze that one too. In the mean time, I will wait for the beta version. Will DisplayFusion alert me that there is a new beta version available or if I select Check for Updates, or will you post it here. Thanks again!

Thanks, Its enabled.

Hello. I am still waiting for the next beta version of DisplayFusion to be released to see if the crashes stop on my Windows 10 system. I have had Windhawk disabled since August 18th and DisplayFusion has continued to crash, most recently today. Can you provide an estimate for when the next beta version that contains a possible fix for my DisplayFusion crashes will be released?

Also, I have 3 more Dump files. The attached screenshot shows all of them. Would you like me to put the 3 new Dump files in the Dropbox folder that I shared? Thanks.

I installed v12.1.2 (beta 1) today. I will report back in a few days about whether the DisplayFusion crashes stop. I re-enabled WindHawk a few days ago since disabling it did not stop the DisplayFurion crashes. After doing so, DisplayFusion crashed more often - at least once per day. Perhaps Windhawk was causing at least some of the crashes. I have diabled Windhawk again after updating DisplayFusion to v12.1.2 (beta 1). If there are no crahses for a few days, I will re-enable Windhawk again and see what happens.

Update - It has been 5 days since I updated DisplayFusion to v12.1.2 (Beta 1). There have been no crashes since updating. Today I re-enabled Windhawk. I will post here if DisplayFusion starts crashing again. I will also make the crash dump files available if requested. Thanks!