Public bug reported: 1. Power on SUT and install Ubuntu 22.04.5 or Ubuntu 24.04.1
2. After booting into OS, open a terminal and check system logs (dmesg and /var/log/messages in RHEL, and /var/log/syslog in Ubuntu) to see if there are any unexpected error/fail/warning logs. 3. There are fail and error logs for i915 and drm in dmesg and /var/log/messages and /var/log/syslog: — i915 0000:00:02.0: [drm] [ENCODER:235:DDI A/PHY A] failed to retrieve link info, disabling eDP i915 0000:00:02.0: [drm] ERROR Unexpected child device config size 40 (expected 39 for VBT version 256) — It seems like theres a patch will check "40" child device size in "/drivers/gpu/drm/i915/display/intel_bios.c" https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5216ec0eeaee781ae74b79e91a270ea1873cabf5 """""" drm/i915/bios: bump expected child device size VBT versions since 256 have an extra byte for EFP index. v2: Update BUILD_BUG_ON() (Matt) Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240226175854.287871-1-jani.nik...@intel.com Signed-off-by: Jani Nikula <jani.nik...@intel.com> Diffstat -rw-r--r-- drivers/gpu/drm/i915/display/intel_bios.c 6 -rw-r--r-- drivers/gpu/drm/i915/display/intel_vbt_defs.h 1 2 files changed, 5 insertions, 2 deletions diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index fe52c06271ef05..f967ab406e353d 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2740,11 +2740,13 @@ parse_general_definitions(struct drm_i915_private *i915) expected_size = 37; } else if (i915->display.vbt.version <= 215) { expected_size = 38; - } else if (i915->display.vbt.version <= 250) { + } else if (i915->display.vbt.version <= 255) { expected_size = 39; + } else if (i915->display.vbt.version <= 256) { + expected_size = 40; } else { expected_size = sizeof(*child); - BUILD_BUG_ON(sizeof(*child) < 39); + BUILD_BUG_ON(sizeof(*child) < 40); drm_dbg(&i915->drm, "Expected child device config size for VBT version %u not known; assuming %u\n", i915->display.vbt.version, expected_size); """""" ** Affects: subiquity (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2079960 Title: [drm] ERROR Unexpected child device config size 40 (expected 39 for VBT version 256) in Ubuntu 24.04.1 and 22.04.5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/2079960/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
