Hello Bogdan, On Wed, Aug 19, 2026 at 01:22:59PM +0100, Bogdan Veringioiu wrote: > Package: linux-image-amd64 > Version: 6.12.101-1 > Severity: important > X-Debbugs-Cc: [email protected], [email protected] > User: [email protected] > Usertags: amd64 > > On boot, once the video driver loads, the screen starts to flicker. It turns > off/on every 2-3 seconds. Does not matter if text console or X is started. > This is a regression. This video card worked in bullseye (kernel 5.10) and > bookworm (kernel 6.1). > > $ dmesg | grep 915 > ... > [ 7.542124] i915 0000:00:02.0: [drm] Found VALLEYVIEW (device ID 0f31) > display version 7.00 stepping N/A > [ 7.546702] i915 0000:00:02.0: vgaarb: deactivate vga console > [ 7.549582] i915 0000:00:02.0: vgaarb: VGA decodes changed: > olddecodes=io+mem,decodes=io+mem:owns=io+mem > [ 7.588070] i915 0000:00:02.0: [drm] *ERROR* Failed to write source OUI > [ 7.671369] [drm] Initialized i915 1.6.0 for 0000:00:02.0 on minor 0 > [ 7.707615] fbcon: i915drmfb (fb0) is primary device > [ 8.978567] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device > > $ lspci -nn > 00:00.0 Host bridge [0600]: Intel Corporation Atom Processor Z36xxx/Z37xxx > Series SoC Transaction Register [8086:0f00] (rev 0e) > 00:02.0 VGA compatible controller [0300]: Intel Corporation Atom Processor > Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0e) > 00:13.0 SATA controller [0106]: Intel Corporation Atom Processor E3800 Series > SATA AHCI Controller [8086:0f23] (rev 0e) > 00:14.0 USB controller [0c03]: Intel Corporation Atom Processor > Z36xxx/Z37xxx, Celeron N2000 Series USB xHCI [8086:0f35] (rev 0e) > 00:1a.0 Encryption controller [1080]: Intel Corporation Atom Processor > Z36xxx/Z37xxx Series Trusted Execution Engine [8086:0f18] (rev 0e) > 00:1b.0 Audio device [0403]: Intel Corporation Atom Processor Z36xxx/Z37xxx > Series High Definition Audio Controller [8086:0f04] (rev 0e) > 00:1c.0 PCI bridge [0604]: Intel Corporation Atom Processor E3800 Series PCI > Express Root Port 1 [8086:0f48] (rev 0e) > 00:1c.1 PCI bridge [0604]: Intel Corporation Atom Processor E3800 Series PCI > Express Root Port 2 [8086:0f4a] (rev 0e) > 00:1c.2 PCI bridge [0604]: Intel Corporation Atom Processor E3800 Series PCI > Express Root Port 3 [8086:0f4c] (rev 0e) > 00:1c.3 PCI bridge [0604]: Intel Corporation Atom Processor E3800 Series PCI > Express Root Port 4 [8086:0f4e] (rev 0e) > 00:1f.0 ISA bridge [0601]: Intel Corporation Atom Processor Z36xxx/Z37xxx > Series Power Control Unit [8086:0f1c] (rev 0e) > 00:1f.3 SMBus [0c05]: Intel Corporation Atom Processor E3800/CE2700 Series > SMBus Controller [8086:0f12] (rev 0e) > 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. > RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] > (rev 0c) > 04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. > RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] > (rev 0c)
Can you please test the most recent kernel from unstable (or testing) and if that doesn't work, bisect over the kernels available on https://snapshot.debian.org/package/linux/. If you need a more detailed instruction, don't hesitate to ask. Best regards Uwe
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