6.11rc6 regression. Phantom simple-framebuffer card on Arc MTL laptop. Bisected
- Intel Corporation Meteor Lake-P [Intel Arc Graphics] Lenovo laptop
Linux 6.11.0-rc7-1-mainline-00097-g196145c606d0 #11 SMP PREEMPT_DYNAMIC Fri, 13 Sep 2024 16:32:11 +0000 x86_64 GNU/Linux
After upgrading from 6.11.rc5 to 6.11.rc6 the phantom display appears on my laptop.
Bisected to [b49420d6] video/aperture: optionally match the device in sysfb_disable()
6.11rc6 (simple-framebuffer Unknown card exists):
$ ls -l /sys/class/drm/
total 0
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card0 -> ../../devices/platform/simple-framebuffer.0/drm/card0
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card0-Unknown-1 -> ../../devices/platform/simple-framebuffer.0/drm/card0/card0-Unknown-1
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1-DP-1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-1
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1-DP-2 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-2
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1-DP-3 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-3
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1-DP-4 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-4
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1-eDP-1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-eDP-1
lrwxrwxrwx 1 root root 0 Sep 13 23:14 card1-HDMI-A-1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-HDMI-A-1
lrwxrwxrwx 1 root root 0 Sep 13 23:14 renderD128 -> ../../devices/pci0000:00/0000:00:02.0/drm/renderD128
-r--r--r-- 1 root root 4096 Sep 13 23:15 version
6.11.rc5 (simple-framebuffer doesn't exist):
$ ls -l /sys/class/drm/
total 0
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1-DP-1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-1
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1-DP-2 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-2
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1-DP-3 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-3
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1-DP-4 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-4
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1-eDP-1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-eDP-1
lrwxrwxrwx 1 root root 0 Sep 13 23:34 card1-HDMI-A-1 -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-HDMI-A-1
lrwxrwxrwx 1 root root 0 Sep 13 23:34 renderD128 -> ../../devices/pci0000:00/0000:00:02.0/drm/renderD128
-r--r--r-- 1 root root 4096 Sep 13 23:35 version
lspci:
00:02.0 VGA compatible controller [0300]: Intel Corporation Meteor Lake-P [Intel Arc Graphics] [8086:7d55] (rev 08) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:3803]
Flags: bus master, fast devsel, latency 0, IRQ 165, IOMMU group 0
Memory at 4818000000 (64-bit, prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, IntMsgNum 0
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit+
Capabilities: [d0] Power Management version 3
Capabilities: [100] Null
Capabilities: [110] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [420] Physical Resizable BAR
Capabilities: [320] Single Root I/O Virtualization (SR-IOV)
Capabilities: [400] Latency Tolerance Reporting
Kernel driver in use: i915
Kernel modules: i915, xe
- drm.debug=0xe log_buf_len=4M ignore_loglevel:
The result is unknown display in preferences:
Edited by darkblaze69