Public bug reported:
Hi guys,
I am experiencing an issue with my notebook that i cannot boot with the
6.17.0-x kernel. I am not too familiar with kernel stuff, so I had a long debug
session with claude, which in the end suggested that it is a bug and created
this report for me. HTH and Thx for looking into it:
== Problem ==
Kernel 6.17.0 (tested multiple versions: -20, -23) causes a kernel panic
on boot when the i915 driver is loaded. The issue is present since the
first 6.17.0 release. Kernel 6.14.0 works fine.
== Symptoms ==
- With i915 in initramfs: Kernel panic before LUKS password prompt (blinking
Caps Lock LED)
- Without i915 in initramfs: LUKS prompt works, then black screen (i915 never
loads)
- With nomodeset: System boots, but no GPU acceleration
- modprobe i915 (with nomodeset): "ERROR: could not insert 'i915': No such
device"
== Hardware ==
- Laptop: Lenovo IdeaPad S340-14IIL
- GPU: Intel Iris Plus Graphics G1 (Ice Lake), PCI ID 8086:8a56 (rev 07)
- Full-disk encryption: LUKS
== Tested kernel parameters (none resolved the panic) ==
- i915.enable_guc=0 → no panic, but black screen
- i915.enable_psr=0 → kernel panic
- i915.enable_dc=0 → kernel panic
- i915.enable_dc=0 i915.enable_psr=0 → kernel panic
- i915.enable_guc=0 i915.enable_psr=0 i915.enable_dc=0 → kernel panic
- i915.force_probe=8a56 → kernel panic
- i915.panel_use_ssc=0 → kernel panic
- i915.fastboot=0 → kernel panic
- nomodeset → works (but no GPU acceleration)
== Working kernel ==
6.14.0 (latest working version)
== Steps to reproduce ==
1. Boot Lenovo IdeaPad S340-14IIL with kernel 6.17.0-23-generic
2. Observe blinking Caps Lock LED (kernel panic) or black screen
== Additional info ==
- linux-firmware was reinstalled (resolved panic in some cases, but display
remained black)
- i915 module exists in /lib/modules/6.17.0-23-generic/ and modinfo shows it
correctly
- i915 firmware files (icl_dmc, icl_guc, icl_huc) are present in
/lib/firmware/i915/
- i915 was NOT automatically included in initramfs despite MODULES=most in
initramfs.conf (possible related issue)
== PCI ID ==
00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics
G1 (Ice Lake) (rev 07)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: i915 ice-lake kernel-panic regression
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https://bugs.launchpad.net/bugs/2151305
Title:
Kernel panic in i915 driver on Ice Lake (Iris Plus G1, 8086:8a56)
since 6.17.0 - Lenovo IdeaPad S340-14IIL
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