(Compiled from HP forums, Reddit, Level1Techs — May 7, 2026)
The bug: Starting with BIOS 01.03.11 (EliteBook) / 01.04.03–01.04.05 (ZBook), the laptop freezes at the HP logo/spinning circle during boot. Circle stops spinning, nothing happens. Some units boot on second attempt, others are completely bricked.
Root cause: Audio hardware initialization timeout during POST. Per HP insider bootfail_cause: it's a "silicon lottery" — slightly faster hardware expects faster response times, and the BIOS timeout is too tight for some units. Explains why some machines are affected and others aren't.
HP force-pushed the broken BIOS as a "Critical" update via Windows Update — automatically, without consent. Multiple users report machines bricked overnight.
| Model | Broken BIOS | Working Fallback | Fix |
|---|---|---|---|
| EliteBook X G1a | 01.03.11, 01.05.00 | 01.02.05 | 01.05.01 (sp170213) ✅ |
| ZBook Ultra G1a | 01.04.03, 01.04.05 | 01.03.11 | Pending — fix not yet merged |
- Network BIOS downgrade — Enter BIOS → Update via Network → downgrade step-by-step (01.04.05 → 01.04.03 → 01.03.11). Requires HP USB-C to Ethernet dongle — other brands may not be recognized by BIOS. WiFi option doesn't work.
- CMOS drain + Win+V — Hold power button 30 sec (fans ramp up twice), then hold Win+V during boot ~15 sec. Temporary workaround to get into Windows.
- Lock BIOS version — After downgrading, disable "Let OS update the BIOS" in BIOS settings.
- USB media downgrade — sp165722.exe (01.03.02) available on HP FTP, but 01.03.02 causes kernel crashes for some. 01.03.11 is the "gold" fallback but only via network.
- Secure Boot corruption — Some users found Windows CA certs unchecked after the freeze. Re-enabling got them booting.
- BIOS 01.05.01 — Fixes EliteBook. Available at
ftp.hp.com/pub/softpaq/sp170001-170500/sp170213.exe. Minor audio crackling on boot reported by some.
- Run Windows
.exein Wine to extract firmware files - Copy to
/boot/efi/EFI/HP/DEVFW/firmware.bin - Reboot → enter BIOS → "Update System Firmware" → select local media
- First attempt after EFI partition change may hang (fans at full speed) — power off/on, retry
Original bug (BIOS 01.03.00+): Fans spike to 100% RPM for a few seconds then stop, even on idle.
Partial fix (BIOS 01.04.03+): Fans no longer hit 100%, but now constant on/off cycling at low RPM — off → low rpm → off → low rpm, many times per minute. Motor clicks audible each time. Worsens fan longevity.
BIOS workaround: Set fan curve to 10/15 in BIOS to keep fans always-on at low speed. On AC, there's an explicit "always on" option. No equivalent option on battery.
C-State hypothesis (Level1Techs): HP's BIOS triggers fans when CPU exits deep C-states (C2/C3). Disabling C2/C3 with cpupower idle-set reduces spin-ups but increases power consumption.
YouTube background hack: Playing a YouTube video in Firefox in the background (even muted) keeps fans stable — power goes from 3W to 4W but the fan on/off loop doesn't trigger.
In BIOS 1.04.03, enabling the AiMT setting causes a hard brick. Unknown what it does. Recovery: hold power 20 sec until caps lock blinks, boot, spam F10 to enter BIOS and disable it.
Third-party chargers keep disconnecting and losing power at random times. HP Ultra G6 dock had similar issues — partially resolved in newer BIOS. One user confirmed updating the G6 dock firmware resolved their power delivery issues.
Daily BSODs with different error codes each time, starting from day 1. Affects 128GB models primarily. HP pulled a February BIOS that was supposed to fix this, then re-released it. Some users had to return units entirely.
- Right fan bearing defect — noticeable grinding/clicking noise from right fan on some units, present from first boot. Replacement fans out of stock.
- Terrible assembly and QC — multiple users returned units for physical defects
- Biased toward Hynix RAM — Every user who reported the boot freeze also had Hynix RAM (not Samsung). May correlate with the "silicon lottery."
- APU idle: ~3W, total system idle ~10W (screen + 128GB RAM consume their share)
- CPU max: 70W sustained, brief 80W bursts, drops to 55W after extended load
- GPU max: 110-120W in high performance mode (
echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level) - Battery life: ~7-8 hours light work, ~5% battery per hour at minimal use
- External monitors (3x 1440p + internal): 7-15W average
- Vapour chamber cooling keeps palmrest cool; good thermal management overall
- PTM7950 thermal pad swap yields 8-10°C improvement (confirmed by multiple Level1Techs users)
amd_iommu=offbreaks deep sleep on kernels 6.18.18+- AC wakeup trigger causes immediate wake — fix:
echo disabled > /sys/devices/platform/ACPI0003:00/power_supply/AC/power/wakeup - System freezes for 1-2 sec on battery with kernel 6.19 (fixed in 6.19.8)
- Fans spinning during sleep (20-30% battery drain overnight) — fixed in kernel 6.19.8
- GNOME/Wayland stutters in video playback on Debian stable — KDE and Xorg work fine
- Long BIOS POST times fixed by draining battery to 0% (full charge/discharge cycle)
- Webcam driver patches progressing:
amd_capturerenamed toamd_isp4_capture(github.com/jtsiros/amd-isp4-camera)
- Forum threads marked "Solved" prematurely
- Support offers: "reinstall Windows," "send it in"
- 2-month depot repair to replace motherboards — for a firmware issue HP caused
- HP deleted original bug report threads from their forum
- Quietly removed "Critical" tag from broken BIOS, quietly made older versions available
- No official fix for ZBook yet — only EliteBook got 01.05.01
- Users filing BBB complaints, contacting Tom's Hardware/The Register
- HP has a documented multi-year pattern: 2021 Victus F.10, 2023 TG01 Desktop, 2024 ProBook/EliteBook 01.17, 2025 EliteBook, 2026 ZBook — all identical bricking via firmware update
- 2024 ProBook incident only resolved after Tom's Hardware and The Register coverage