From: owner@bugs.debian.org   
      
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   Your message dated Fri, 23 Jan 2026 22:28:34 +0100   
   with message-id    
   and subject line Re: Bug#1125978: linux-image-6.17.13+deb13-amd64:  kernel:   
   i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun on NUC7 at high   
   resolution HDMI   
   has caused the Debian Bug report #1125978,   
   regarding linux-image-6.17.13+deb13-amd64:  kernel: i915 0000:00:02.0: [drm]   
   *ERROR* CPU pipe A FIFO underrun on NUC7 at high resolution HDMI   
   to be marked as done.   
      
   This means that you claim that the problem has been dealt with.   
   If this is not the case it is now your responsibility to reopen the   
   Bug report if necessary, and/or fix the problem forthwith.   
      
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   --    
   1125978: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1125978   
   Debian Bug Tracking System   
   Contact owner@bugs.debian.org with problems   
      
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   From: keith    
   To: Debian Bug Tracking System    
   Subject: linux-image-6.17.13+deb13-amd64:  kernel: i915 0000:00:02.0: [drm]   
   *ERROR* CPU pipe A FIFO underrun on NUC7 at high resolution HDMI   
   Message-ID: <176885506241.8070.12250557588375634509.reportbug@NUC7d>   
   X-Mailer: reportbug 13.2.0   
   Date: Mon, 19 Jan 2026 20:37:42 +0000   
   Delivered-To: submit@bugs.debian.org   
      
   Package: src:linux   
   Version: 6.17.13-1~bpo13+1   
   Severity: important   
   X-Debbugs-Cc: debian-amd64@lists.debian.org, keith.hewitt@blueyonder.co.uk   
   User: debian-amd64@lists.debian.org   
   Usertags: amd64   
      
   Dear Maintainer,   
      
   *** Reporter, please consider answering these questions, where appropriate ***   
      
      * What led up to the situation?   
   Debian installed with low re monitor - all OK. Switched monitor + higher   
   resolution & errors started to appear   
      * What exactly did you do (or not do) that was effective (or   
        ineffective)?   
   I tried the following kernel parameters:   
   i915.enable_fbc=1/0   
   i915.enable_psr=0   
   i915.enable_guc=3   
   i915.enable_dc=0   
   intel_idle.max_cstate=1/2/4   
   intel_iommu=igfx_off   
   Some seemed to work for a while, but not after a period of time   
      
   Updated the Kernel from 6.12.63 to 6.17.13 - no difference   
      
   Full output from   
   sudo journalctl -b | grep -i "hdmi\|drm" | tail -n 100   
   Jan 19 18:22:01 NUC7d kernel: ACPI: bus type drm_connector registered   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] Found kabylake/ult   
   (device ID 5926) integrated display version 9.00 stepping B1   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] Found 64MB of eDRAM   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] VT-d active for gfx   
   access   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] Using Transparent   
   Hugepages   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] Finished loading DMC   
   firmware i915/kbl_dmc_ver1_04.bin (v1.4)   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] [ENCODER:105:DDI A/PHY   
   A] failed to retrieve link info, disabling eDP   
   Jan 19 18:22:01 NUC7d kernel: [drm] Initialized i915 1.6.0 for 0000:00:02.0 on   
   minor 0   
   Jan 19 18:22:01 NUC7d kernel: fbcon: i915drmfb (fb0) is primary device   
   Jan 19 18:22:01 NUC7d kernel: i915 0000:00:02.0: [drm] fb0: i915drmfb frame   
   buffer device   
   Jan 19 18:22:01 NUC7d systemd[1]: Starting modprobe@drm.service - Load Kernel   
   Module drm...   
   Jan 19 18:22:01 NUC7d systemd[1]: modprobe@drm.service: Deactivated   
   successfully.   
   Jan 19 18:22:01 NUC7d systemd[1]: Finished modprobe@drm.service - Load Kernel   
   Module drm.   
   Jan 19 18:22:03 NUC7d kernel: input: HDA Intel PCH HDMI/DP,pcm=3 as   
   /devices/pci0000:00/0000:00:1f.3/sound/card1/input15   
   Jan 19 18:22:03 NUC7d kernel: input: HDA Intel PCH HDMI/DP,pcm=7 as   
   /devices/pci0000:00/0000:00:1f.3/sound/card1/input16   
   Jan 19 18:22:03 NUC7d kernel: input: HDA Intel PCH HDMI/DP,pcm=8 as   
   /devices/pci0000:00/0000:00:1f.3/sound/card1/input17   
   Jan 19 18:30:13 NUC7d kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO   
   underrun   
      
      
      
      * What was the outcome of this action?   
      * What outcome did you expect instead?   
      
   [continued in next message]   
      
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