====== HP 255 G4 (likely N0Y29EA) ======

===== Hardware Overview =====

  * CPU: AMD Quad-Core A6-6310 APU (1.8 GHz; Turbo Core 2.4 GHz, 15 W)
  * Memory: 8 GB DDR3L-1600 (max 8 GB; two SODIMM slots)
  * Screen: 15.6" HD SVA anti-glare flat LED-backlit (1366 × 768)
  * Internal storage: supports all 7 mm / 9.5 mm SATA 2.5" drives
  * Ethernet: %%RealTek%% 810xE PCIe 10/100baseTX (supported by ''%%re(4)%%'')
  * Wireless: Broadcom BCM43142 802.11b/g/n (1×1) [[/WiFi|WiFi]] and Bluetooth 4.0 combo
  * Card reader: multi-format SD/SDHC/SDXC media (detected by ''%%sdhci(4)%%'', untested)
  * Keyboard: Full-sized textured black island-style (with numpad)
  * Touchpad with multi-touch gesture support
  * External ports: 1 USB 3.0, 2 USB 2.0, 1 VGA, 1 HDMI, 1 headphone/line-out, 1 microphone/line-in, 1 RJ-45
  * Dimensions: 38.43 × 25.46 × 2.43 cm
  * Weight: 2.1 kg (4.73 lb)
  * Power supply: 45 W or 65 W AC adapter
  * Battery: 3-cell (31 W⋅h) or 4-cell (41 W⋅h) Li-ion

===== Notes =====

Middle-level oriented, inexpensive laptop with relatively good CPU (APU) and RAM size in stock configuration.  Nothing special, except that there is no air intake on its bottom (nice).  Matte coating of the wrist-rest and screen lid (as well as the screen itself) is also a plus.  It got my interest solely because of AMD APU (unfortunately, Intel rules these days, and almost no vendors except HP and Lenovo produce AMD-based laptops).

Comes with some Windows 8.1 or 10 preinstalled (%%FreeDOS%% 2.0 versions should be available according to [[http://support.hp.com/hk-en/document/c04608119|specification]], but probably hard to find in retail).  Getting into UEFI BIOS is possible by pressing F9 (as I vaguely recall) early in the boot process.  Disabling [[/SecureBoot|SecureBoot]] allowed to boot off USB memstick, flashed with 11.0-CURRENT-[[http://svnweb.freebsd.org/base?view=revision&revision=295683|r295683]]; ''%%vt(4)%%'' is required if you want to see anything on the console.  KMS appears to work with ''%%radeonkms.ko%%''.  X11 was not tested.  [[/WiFi|WiFi]] adapter was not detected by GENERIC kernel, but Bluetooth was (''%%ubt0%%'' device created).

==== ACPI issues ====

Pretty much the same as described in [[Laptops/HP_Notebook_15-af104ur]] page, common for HP laptops.

===== Details =====

  * {{laptops/hp_255_g4/hp-255-dmesg.out?linkonly|boot dmesg}}
  * {{laptops/hp_255_g4/hp-255-pciconf.out?linkonly|pciconf -lv}}
  * {{laptops/hp_255_g4/hp-255-devinfo.out?linkonly|devinfo -v}}
  * {{laptops/hp_255_g4/hp-255-dsdt.out?linkonly|acpidump -dt}}

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{{tag>Laptop Mobile}}