https://bugs.kde.org/show_bug.cgi?id=512866
Bug ID: 512866
Summary: Intel GPU using xe driver not detected/displayed
Classification: Applications
Product: plasma-systemmonitor
Version First git-stable-Plasma/6.3
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: ---
Created attachment 187304
--> https://bugs.kde.org/attachment.cgi?id=187304&action=edit
Screenshot of System monitor
SUMMARY
Intel discrete GPU (Arc B580) using the xe kernel driver is not detected or
displayed in Plasma System Monitor's GPU information, while it works correctly
in other tools.
STEPS TO REPRODUCE
1. Have an Intel GPU using the xe driver (e.g., Arc B580, Battlemage)
2. Open Plasma System Monitor or KDE Info Center
3. Look for GPU information
OBSERVED BEHAVIOR
The Intel GPU using the xe driver does not appear in the GPU listing.
EXPECTED BEHAVIOR
The GPU should be detected and displayed, similar to how it appears in nvtop
and other monitoring tools.
SYSTEM INFORMATION
- Plasma 6.x / KInfoCenter 6.5.3
- Kernel: 6.17.9-2-cachyos
- GPU: Intel Arc B580 (Battlemage G21) [8086:e20b]
- Driver: xe (not i915)
- Mesa: 25.2.7
ADDITIONAL INFORMATION
The GPU is fully functional and detected by:
- lspci: Shows "VGA compatible controller: Intel Corporation Battlemage G21
[Arc B580]"
- /sys/class/drm/card0: Present with correct vendor/device IDs
- nvtop: Detects and monitors the GPU correctly
- glxinfo: Reports "Mesa Intel(R) Arc(tm) B580 Graphics"
The xe driver is the only supported driver for Battlemage GPUs - i915 cannot be
used as an alternative.
It appears the GPU detection code may only look for i915/amdgpu/nvidia drivers
and not the newer xe driver.
REPRODUCTION HINTS FOR DEVELOPERS
The xe driver can be identified via:
- /sys/class/drm/card*/device/uevent contains "DRIVER=xe"
- /sys/class/drm/card*/device/driver symlink points to ".../drivers/xe"
xe driver sysfs structure is similar to i915 but under a different driver path:
- /sys/bus/pci/drivers/xe/ (vs /sys/bus/pci/drivers/i915/)
The xe driver DOES expose hwmon sensors (power, temp, fan):
- /sys/class/hwmon/hwmon*/name = "xe"
- temp2_label: "pkg", temp3_label: "vram"
- energy1_label: "card", energy2_label: "pkg"
- fan1_input, fan2_input, fan3_input
Detection approach that works:
1. Enumerate /sys/class/drm/card*
2. Check /sys/class/drm/card*/device/uevent for DRIVER=
3. Accept "xe" in addition to "i915", "amdgpu", "nvidia", etc.
Affected hardware (xe driver only, no i915 fallback):
- Intel Arc B-series (Battlemage): B580, B570
- Intel Lunar Lake integrated graphics
- Future Intel discrete GPUs
The i915 driver cannot be used for these GPUs - xe is the only option.
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