Bug 506299

Summary: Wacom Cintiq 22HD Pen/Touch Tablet Display loses signal after desktop sleeps > wakes
Product: [Plasma] kwin Reporter: Jack <junksmith398>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: kdedev, xaver.hugl
Priority: NOR    
Version First Reported In: 6.4.1   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Bug Depends on:    
Bug Blocks: 506893    

Description Jack 2025-06-28 01:02:22 UTC 
SUMMARY
I run a 3-screen setup: 2 monitors, and 1 Wacom Cintiq tablet. When the computer loads up, everything is functioning as normal. When the computer sleeps (or locks) and wakes, the 2 monitors display properly, but the Wacom display states there is no signal (despite all three displays still being recognized and enabled in display configuration). All hardware is working properly on launch, is not altered while in use, and is functioning correctly in general (as demonstrated when this issue does not show up in other OS's, like Gnome).

STEPS TO REPRODUCE
1. Start the computer (3 monitor setup, as above). All 3 displays, including the Cintiq tablet, are recognized and have signals.  
2.  Put the computer to sleep, and wake the computer
3.  Now, the 2 standard monitors will display properly, but the Wacom Cintiq tablet will state there is no signal. Display configurations shows that all three screens (including the Wacom display) are all recognized and enabled. Hardware is unchanged.  
4. Logging out/in results in a black screen on the previously working monitors (still no signal on the Cintiq). The only way to fix the issue is to restart the computer. 

OBSERVED RESULT
The 2 standard monitors will display properly, but the Wacom Cintiq tablet will state there is no signal. Display Configurations shows that all three screens (including the Wacom display) are all recognized and enabled. Hardware is unchanged. If attempting to log out/in, a black screen appears on the previously working monitors (still no signal on the Cintiq). 

EXPECTED RESULT
All 3 displays, including the Wacom display, should be recognized, enabled, and receive signals properly. 

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  Fedora 42 (Kernel v. 6.15.3-200.fc42z86_64 (64-bit))
KDE Plasma Version:  6.4.1
KDE Frameworks Version:  6.15.0
Qt Version:  6.9.1

Spectacle version 1:6.4.1-1.fc42

ADDITIONAL INFORMATION
Hardware Specs: 
AMD Ryzen 7 7800X3D 8-core processor
Memory 48 giB of RAM
Graphics Processor 1: AMD Radeon RX 6700 XT (discrete)
Graphics Processor 2: AMD Radeon Graphics (integrated)
Wayland graphics

ADDITIONAL INFORMATION
Wacom Cintiq 22HD Pen/Touch Tablet
Comment 1 TraceyC 2025-07-11 19:46:58 UTC 
Moving to kwin, which handles displays
Comment 2 Zamundaaa 2025-08-22 12:00:33 UTC 
Please attach the output of drm_info, once for when the displays are all enabled and working, and once for when the tablet doesn't turn on.
Comment 3 Bug Janitor Service 2025-09-06 03:48:11 UTC 
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 4 Bug Janitor Service 2025-09-21 03:47:18 UTC 
🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.