https://bugs.kde.org/show_bug.cgi?id=507410
Bug ID: 507410
Summary: [Wayland] Suspend failure with AMD TeraScale dual GPU
(HD 6520G+6630M) - Screen corruption/black screen
Classification: Plasma
Product: kwin
Version First 6.4.3
Reported In:
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
KDE Wayland suspend fails completely on AMD TeraScale dual GPU hardware (HD
6520G + HD 6630M) resulting in graphics corruption or irrecoverable black
screen. Same hardware works perfectly with KDE X11.
STEPS TO REPRODUCE
1. Use ASUS N53Ta laptop with AMD A6-3420M APU + dual GPU (HD 6520G integrated
+ HD 6630M discrete)
2. Boot openSUSE Tumbleweed with radeon driver (amdgpu blacklisted due to
conflicts)
3. Login to KDE Plasma Wayland session
4. Execute suspend: systemctl suspend
5. Try to wake system with keyboard/mouse/power button
OBSERVED RESULT
- Default suspend (deep): Graphics corruption with horizontal lines and visual
artifacts
- Alternative methods tested (s2idle, freeze): Complete black screen, system
totally unresponsive
- No recovery possible via Ctrl+Alt+F1-F7, Alt+SysRq, or any other method
- Forced reboot required in all cases
EXPECTED RESULT
System should suspend and resume normally without graphics corruption, as it
does when using KDE X11 session on the same hardware.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed 20250718
KDE Plasma Version: 6.4.3
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
Kernel: 6.15.6-1-default (64-bit)
Graphics Platform: Wayland (issue occurs here, X11 works fine)
ADDITIONAL INFORMATION
Hardware Details:
- Manufacturer: ASUSTeK Computer Inc.
- Product: N53Ta (2011)
- CPU: 4 × AMD A6-3420M APU with Radeon HD Graphics
- Memory: 6 GiB RAM (5.3 GiB usable)
- GPU 1: AMD SUMO (HD 6520G - TeraScale integrated)
- GPU 2: AMD TURKS (HD 6630M - TeraScale discrete)
Driver Configuration:
- Using radeon driver only (amdgpu blacklisted to avoid conflicts)
- lsmod shows: radeon 2101248 45
Power State Information:
- /sys/power/state: freeze mem disk
- /sys/power/mem_sleep: s2idle [deep]
- GPU states: card0=D0 (active), card1=D3cold (suspended)
KWin Log Evidence:
kwin_wayland_drm: drmSetClientCap for Atomic Mode Setting failed. Using legacy
mode on GPU "/dev/dri/card0"
Tests Performed:
- All suspend methods fail: systemctl suspend, s2idle mode, freeze mode
- Various kernel parameters tested (radeon.dmp, ACPI quirks): no effect
- systemd suspend hooks and kwin restart scripts: no effect
- Runtime power management configurations: no effect
Environment Comparison:
- KDE X11: Suspend works perfectly on same hardware
- GNOME Wayland: Previously worked on same hardware
- KDE Wayland: Complete failure with any suspend method
Related Hardware:
This issue appears specific to AMD TeraScale dual GPU configurations (2011-2012
era). Similar reports found:
- Ubuntu Bug #1313804 (HP Pavilion dv6 with same HD 6520G+6630M GPUs)
- KDE Bug #454639 (AMD flickering after Wayland suspend)
- Multiple openSUSE forum reports of KDE Wayland + AMD suspend issues
The hardware is pre-GCN (Graphics Core Next) and kwin_wayland appears to have
compatibility issues with TeraScale architecture during suspend/resume
operations.
Analysis conducted with assistance from Claude AI (Anthropic) including
systematic testing and research of similar reported issues.
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