Bug#1018760: i915: "Failed to get the SoC PWM chip", unable to adjust backlight on x7-Z8750 / GPD Pocket 1
Package: src:linux
Version: 5.10.136-1
Severity: normal
X-Debbugs-Cc: krylov.r00t@gmail.com
Dear Maintainer,
On my GPD Pocket 1, the backlight worked well with the 4.19 kernel from
stretch-backports. After the upgrade to Bullseye, I cannot adjust the
backlight intensity either using the keyboard shortcuts or by writing
into /sys/class/backlight/acpi_video0/brightness. In the latter case,
the write succeeds but doesn't have an effect on my display.
I can also see this problem with the 5.18 kernel from bullseye-backports.
The following lines from the kernel log seem to be relevant, but I'm
afraid I'm completely at a loss regarding what can be done to fix the
problem:
[ +0,009771] i915 0000:00:02.0: [drm] *ERROR* Failed to get the SoC PWM chip
[ +0,006728] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
I do have VirtualBox installed from Debian Fasttrack, which does taint
the kernel, but the problem has been present even before I installed the
package.
Please let me know if there's anything else I can do to help.
-- Package-specific info:
** Kernel log: boot messages should be attached
** Model information
sys_vendor: Default string
product_name: Default string
product_version: Default string
chassis_vendor: Default string
chassis_version: Default string
bios_vendor: American Megatrends Inc.
bios_version: 5.11
board_vendor: AMI Corporation
board_name: Default string
board_version: Default string
** PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series SoC Transaction Register [8086:2280] (rev 34)
Subsystem: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series SoC Transaction Register [8086:7270]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Kernel driver in use: iosf_mbi_pci
00:02.0 VGA compatible controller [0300]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller [8086:22b0] (rev 34) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller [8086:7270]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 124
Region 0: Memory at a0000000 (64-bit, non-prefetchable) [size=16M]
Region 2: Memory at 80000000 (64-bit, prefetchable) [size=512M]
Region 4: I/O ports at f000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
00:0b.0 Signal processing controller [1180]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Power Management Controller [8086:22dc] (rev 34)
Subsystem: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Power Management Controller [8086:7270]
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 133
Region 0: Memory at a1a3b000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: proc_thermal
Kernel modules: processor_thermal_device_pci_legacy
00:14.0 USB controller [0c03]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series USB xHCI Controller [8086:22b5] (rev 34) (prog-if 30 [XHCI])
Subsystem: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series USB xHCI Controller [8086:7270]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 123
Region 0: Memory at a1a00000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
00:1a.0 Encryption controller [1080]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Trusted Execution Engine [8086:2298] (rev 34)
Subsystem: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Trusted Execution Engine [8086:7270]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 131
Region 0: Memory at a1900000 (32-bit, non-prefetchable) [size=1M]
Region 1: Memory at a1800000 (32-bit, non-prefetchable) [size=1M]
Capabilities: <access denied>
Kernel driver in use: mei_txe
Kernel modules: mei_txe
00:1c.0 PCI bridge [0604]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCI Express Port #1 [8086:22c8] (rev 34) (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 117
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: a1000000-a14fffff [size=5M]
Prefetchable memory behind bridge: [disabled]
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16+ MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1f.0 ISA bridge [0601]: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCU [8086:229c] (rev 34)
Subsystem: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCU [8086:7270]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Capabilities: <access denied>
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
01:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4356 802.11ac Wireless Network Adapter [14e4:43ec] (rev 02)
Subsystem: Gemtek Technology Co., Ltd BCM4356 802.11ac Wireless Network Adapter [17f9:0036]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 136
Region 0: Memory at a1400000 (64-bit, non-prefetchable) [size=32K]
Region 2: Memory at a1000000 (64-bit, non-prefetchable) [size=4M]
Capabilities: <access denied>
Kernel driver in use: brcmfmac
Kernel modules: brcmfmac
** USB devices:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 258a:0111 SINO WEALTH Gaming Keyboard
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
-- System Information:
Debian Release: 11.4
APT prefers stable-security
APT policy: (500, 'stable-security'), (500, 'stable-debug'), (500, 'oldoldstable-debug'), (500, 'oldoldstable'), (500, 'stable'), (100, 'bullseye-fasttrack'), (100, 'bullseye-backports-staging')
Architecture: amd64 (x86_64)
Kernel: Linux 5.18.0-0.deb11.3-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages linux-image-5.10.0-17-amd64 depends on:
ii initramfs-tools [linux-initramfs-tool] 0.140
ii kmod 28-1
ii linux-base 4.6
Versions of packages linux-image-5.10.0-17-amd64 recommends:
ii apparmor 2.13.6-10
ii firmware-linux-free 20200122-1
Versions of packages linux-image-5.10.0-17-amd64 suggests:
pn debian-kernel-handbook <none>
ii grub-efi-amd64 2.04-20
pn linux-doc-5.10 <none>
Versions of packages linux-image-5.10.0-17-amd64 is related to:
pn firmware-amd-graphics <none>
pn firmware-atheros <none>
pn firmware-bnx2 <none>
pn firmware-bnx2x <none>
ii firmware-brcm80211 20210315-3
pn firmware-cavium <none>
ii firmware-intel-sound 20210315-3
pn firmware-intelwimax <none>
pn firmware-ipw2x00 <none>
pn firmware-ivtv <none>
pn firmware-iwlwifi <none>
pn firmware-libertas <none>
pn firmware-linux-nonfree <none>
ii firmware-misc-nonfree 20210315-3
pn firmware-myricom <none>
pn firmware-netxen <none>
pn firmware-qlogic <none>
pn firmware-realtek <none>
pn firmware-samsung <none>
pn firmware-siano <none>
pn firmware-ti-connectivity <none>
pn xen-hypervisor <none>
-- no debconf information
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