Package: src:linux Version: 6.18.5-1~bpo13+1 Severity: important X-Debbugs-Cc: [email protected]
Greetings. When the Kernel command-line parameter 'amdgpu.dc=0' is used, the screen resolution (and TTY font) does not change on boot (i.e. stays whatever was used in GRUB). The boot messages stop updating and a few seconds after, the screen turns off. Excerpt from 'journalctl --boot=PREVIOUS_BOOT_HASH': --- Feb 21 08:54:18 x7 systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE Feb 21 08:54:18 x7 systemd[1]: lightdm.service: Failed with result 'exit-code'. Feb 21 08:54:18 x7 systemd[1]: lightdm.service: Triggering OnFailure= dependencies. --- Exerpt from '/var/log/Xorg.0.log.old' --- [ 13.170] (II) AMDGPU(0): glamor X acceleration enabled on AMD Radeon RX 570 Series (radeonsi, polaris10, ACO, DRM 3.64, 6.18.5+deb13-amd64) [ 13.170] (II) AMDGPU(0): glamor detected, initialising EGL layer. [ 13.170] (==) AMDGPU(0): TearFree property default: auto [ 13.170] (==) AMDGPU(0): VariableRefresh: disabled [ 13.170] (==) AMDGPU(0): AsyncFlipSecondaries: disabled [ 13.170] (II) AMDGPU(0): KMS Pageflipping: enabled [ 13.170] (WW) AMDGPU(0): No outputs definitely connected, trying again... [ 13.170] (WW) AMDGPU(0): Unable to find connected outputs - setting 1024x768 initial framebuffer [ 13.170] (II) AMDGPU(0): mem size init: gart size :1f0bb8000 vram size: s:fefd0000 visible:fad0000 [ 13.170] (==) AMDGPU(0): DPI set to (96, 96) [ 13.170] (==) AMDGPU(0): Using gamma correction (1.0, 1.0, 1.0) [ 13.170] (II) Loading sub module "ramdac" [ 13.170] (II) LoadModule: "ramdac" [ 13.170] (II) Module "ramdac" already built-in [ 13.170] (EE) AMDGPU(0): No modes. [ 13.171] (II) UnloadModule: "amdgpu" [ 13.171] (II) UnloadSubModule: "glamoregl" [ 13.171] (II) Unloading glamoregl [ 13.171] (EE) Screen(s) found, but none have a usable configuration. [ 13.171] (EE) Fatal server error: [ 13.171] (EE) no screens found(EE) [ 13.171] (EE) --- Full log: https://paste.debian.net/hidden/6f585df9 (expires: 2026-05-22 09:39:21 UTC+0) Manual bisect results: - 6.12.63+deb13-amd64 --> GOOD - 6.16.7+deb14-amd64 --> GOOD - 6.17.13+deb13-amd64 --> GOOD - 6.18.5+deb13-amd64 --> BAD Removing the paramameter 'amdgpu.dc=0' does bring back Xorg to a working state. However, this should not break Xorg at all. Currently I need this parameter such that adjusting the brightness is possible using the 'ddcutil' application. -- Package-specific info: ** Kernel log: boot messages should be attached ** Model information sys_vendor: Gigabyte Technology Co., Ltd. product_name: Z87-HD3 product_version: To be filled by O.E.M. chassis_vendor: Gigabyte Technology Co., Ltd. chassis_version: To Be Filled By O.E.M. bios_vendor: American Megatrends Inc. bios_version: F8 board_vendor: Gigabyte Technology Co., Ltd. board_name: Z87-HD3 board_version: To be filled by O.E.M. ** Configuration for modprobe: blacklist microcode blacklist arkfb blacklist aty128fb blacklist atyfb blacklist radeonfb blacklist cirrusfb blacklist cyber2000fb blacklist kyrofb blacklist matroxfb_base blacklist mb862xxfb blacklist neofb blacklist pm2fb blacklist pm3fb blacklist s3fb blacklist savagefb blacklist sisfb blacklist tdfxfb blacklist tridentfb blacklist vt8623fb blacklist microcode options snd_pcsp index=-2 options cx88_alsa index=-2 options snd_atiixp_modem index=-2 options snd_intel8x0m index=-2 options snd_via82xx_modem index=-2 options md_mod start_ro=1 options bonding max_bonds=0 options dummy numdummies=0 options ifb numifbs=0 ** PCI devices: 00:16.0 Communication controller [0780]: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 [8086:8c3a] (rev 04) Subsystem: Gigabyte Technology Co., Ltd Device [1458:1c3a] 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 37 IOMMU group: 3 Region 0: Memory at f7f1a000 (64-bit, non-prefetchable) [size=16] Capabilities: <access denied> Kernel driver in use: mei_me Kernel modules: mei_me 00:1c.0 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 [8086:8c10] (rev d5) (prog-if 00 [Normal decode]) Subsystem: Gigabyte Technology Co., Ltd Device [1458:5001] 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 26 IOMMU group: 6 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: [disabled] [16-bit] Memory behind bridge: [disabled] [32-bit] Prefetchable memory behind bridge: [disabled] [64-bit] 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 Kernel modules: shpchp 00:1c.2 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 [8086:8c14] (rev d5) (prog-if 00 [Normal decode]) Subsystem: Gigabyte Technology Co., Ltd Device [1458:5001] 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 C routed to IRQ 27 IOMMU group: 7 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 I/O behind bridge: d000-dfff [size=4K] [16-bit] Memory behind bridge: f7d00000-f7dfffff [size=1M] [32-bit] Prefetchable memory behind bridge: f0300000-f03fffff [size=1M] [32-bit] 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 Kernel modules: shpchp 00:1f.0 ISA bridge [0601]: Intel Corporation Z87 Express LPC Controller [8086:8c44] (rev 05) Subsystem: Gigabyte Technology Co., Ltd Device [1458:5001] 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 IOMMU group: 10 Capabilities: <access denied> Kernel driver in use: lpc_ich Kernel modules: lpc_ich 00:1f.3 SMBus [0c05]: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller [8086:8c22] (rev 05) Subsystem: Gigabyte Technology Co., Ltd Device [1458:5001] 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- Interrupt: pin C routed to IRQ 18 IOMMU group: 10 Region 0: Memory at f7f15000 (64-bit, non-prefetchable) [size=256] Region 4: I/O ports at f000 [size=32] Kernel driver in use: i801_smbus Kernel modules: i2c_i801 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df] (rev ef) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:04c2] 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 36 IOMMU group: 1 Region 0: Memory at e0000000 (64-bit, prefetchable) [size=256M] Region 2: Memory at f0000000 (64-bit, prefetchable) [size=2M] Region 4: I/O ports at e000 [size=256] Region 5: Memory at f7e00000 (32-bit, non-prefetchable) [size=256K] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: amdgpu Kernel modules: amdgpu 01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] [1002:aaf0] Subsystem: ASUSTeK Computer Inc. Device [1043:aaf0] 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 B routed to IRQ 38 IOMMU group: 1 Region 0: Memory at f7e60000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel ** USB devices: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:8000 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 8087:8008 Intel Corp. Integrated Rate Matching Hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub -- System Information: Debian Release: 13.3 APT prefers stable APT policy: (500, 'stable'), (500, 'oldstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 6.18.5+deb13-amd64 (SMP w/4 CPU threads; PREEMPT) Locale: LANG=de_CH.UTF-8, LC_CTYPE=de_CH.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages linux-image-6.18.5+deb13-amd64 depends on: ii initramfs-tools [linux-initramfs-tool] 0.148.3 ii kmod 34.2-2 ii linux-base 4.12 ii linux-base-6.18.5+deb13-amd64 6.18.5-1~bpo13+1 Versions of packages linux-image-6.18.5+deb13-amd64 recommends: ii apparmor 4.1.0-1 Versions of packages linux-image-6.18.5+deb13-amd64 suggests: pn debian-kernel-handbook <none> ii firmware-linux-free 20241210-2 ii grub-efi-amd64 2.12-9 pn linux-doc-6.18 <none> Versions of packages linux-image-6.18.5+deb13-amd64 is related to: ii firmware-amd-graphics 20250410-2 ii firmware-atheros 20250410-2 ii firmware-bnx2 20250410-2 ii firmware-bnx2x 20250410-2 ii firmware-brcm80211 20250410-2 ii firmware-cavium 20250410-2 ii firmware-cirrus 20250410-2 ii firmware-intel-graphics 20250410-2 ii firmware-intel-misc 20250410-2 ii firmware-intel-sound 20250410-2 ii firmware-ipw2x00 20250410-2 ii firmware-ivtv 20250410-2 ii firmware-iwlwifi 20250410-2 ii firmware-libertas 20250410-2 ii firmware-marvell-prestera 20250410-2 ii firmware-mediatek 20250410-2 ii firmware-misc-nonfree 20250410-2 ii firmware-myricom 20250410-2 ii firmware-netronome 20250410-2 ii firmware-netxen 20250410-2 ii firmware-nvidia-graphics 20250410-2 pn firmware-qcom-soc <none> ii firmware-qlogic 20250410-2 ii firmware-realtek 20250410-2 pn firmware-samsung <none> ii firmware-siano 20250410-2 pn firmware-ti-connectivity <none> pn xen-hypervisor <none> -- no debconf information
