Toshiba Libretto U100

  • Editors' rating
    7.9 Very good


  • Packed with features
  • attractive hardware design
  • extremely portable
  • superb-quality screen


  • Keyboard is too small for touch typing
  • small on-screen items are difficult to read
  • docking unit with optical drive adds extra weight

The name Libretto might ring a few bells. Toshiba introduced a miniature range of portable computers with this name back in 1996, initially in Japan. The Libretto arrived in Europe in 1997, but was subsequently dropped from Toshiba's product line-up. Now it has returned as an ultra-ultraportable that packs in a remarkably full set of features. However, the Libretto U100 is expensive at £1,249 (ex. VAT), so for the money needs to be a fully functional notebook. Does it deliver?

The Libretto U100 looks very impressive, with the main system unit styled in black, and the lid half white, half silver magnesium. This provides very solid protection for the screen, as well as giving the U100 a distinctive and appealing look. Clearly the Libretto U100 is small, but just how small has to be seen to be believed. It actually comes in two parts: the computer itself and a docking unit called the SuperMulti Dock, which houses the optical drive (a multi-format DVD burner, no less). The main unit measures 21cm wide by 16.5cm deep by 2.98-3.34 mm high, the variance in height being due to a tapering of the lid towards the front. Without the docking unit, the U100 weighs just 0.98kg. The SuperMulti Dock adds about 1.4cm to the height and about a centimetre to the depth with a protrusion at the front. With this unit attached, the Libretto U100 weighs 1.43kg. Not surprisingly, both the keyboard and the screen are smaller than usual. The screen measures just 7.2in. across the diagonal, yet has a native resolution of 1,280 by 768 pixels (WXGA). It has a backlight comprising 32 LEDs and has slightly reflective surface. Even so, it's bright, very clear and absolutely pin-sharp. Delivering a high resolution in such a small space makes it quite difficult to read text on the screen if you sit the usual distance away from it. When writing this review on the Libretto U100, we found it necessary to hunch over the system in order to get close enough to the display. On the other hand, watching DVDs on-screen is extremely rewarding. We had different issues with the keyboard, which is a bit of a challenge even for the small of finger. We measured its QWERTY keys at 12m wide and 9mm deep with 2mm spacing, and although it's possible to touch-type if you reduce your typing speed, working at normal pace produces far too many typos. Hunt-and-peck typists may find this less of an issue, though. The U100's tiny wrist-rest area houses a two-button AccuPoint joypad that's used for cursor manipulation, plus a fingerprint reader to the right of the right mouse button. The 3,400mAh Li-ion battery, which is removable, sits on the back of the system, protruding slightly from a flush position.

The Libretto uses the 1.2GHz ultra low-voltage Pentium M 753 processor, which has 2MB of Level 2 cache and a 400MHz frontside bus (FSB). The Atheros AR5005GS wireless networking module supports the 802.11b and g standards, while the integrated graphics are handled not by Intel's most recent 915GM chipset with the Graphics Media Accelerator 900, but by the previous-generation 855GME, which can dynamically use up to 64MB of main system memory. Our review model came with 512MB of system memory (expandable to 1GB) and a 60GB, 4,200rpm hard drive. A hard drive protection module detects vibration or sudden movement and can put the drive head into a safe position. An on-screen message lets you know when this occurs -- you can set the ‘detection level’ at which this protection kicks in, or turn it off completely. Connectors and ports pepper the front, left and right edges of the system. On the left-hand side there's a switch for the 802.11b/g and Bluetooth modules, a single PC Card slot and a mini VGA-out port (Toshiba bundles a converter to a standard VGA connector). The front houses an SD card slot, a FiewWire (IEEE 1394) connector and a range of status LEDs, plus a hefty slider for ejecting PC cards. The right-hand side accomodates a volume control wheel, headphone and microphone jacks, a pair of USB 2.0 ports and connectors for the integrated 56Kbps modem and 10/100 Ethernet module. The SuperMulti Dock could have boosted the connectivity options -- in particular by providing more USB ports and perhaps further flash card support, as well as legacy connectors such as PS/2 or parallel. However, it doesn’t: its sole job is to house the multi-format DVD burner and provide a range of media control buttons (fast forward, rewind, play, pause) on the front protrusion. For convenience, and to conserve battery life, you can play DVDs and CDs without booting the system into Windows.

Performance & battery life
Ultraportable computers are rarely stellar performers, although Acer's recent TravelMate 3004WTMi is an honourable exception. However, the TravelMate 3004WTMi is built on Intel's latest Sonoma platform and has a 2GHz/533MHz FSB Pentium M processor, unlike the Libretto U100, which uses the older 855GME chipset and has a 1.2GHz/400MHz FSB version of the Pentium M. As result, the Libretto's MobileMark 2002 productivity score of 146 is solid rather than spectacular. It's way behind the TravelMate 3004WTMi's remarkable score of 256 -- although to put this in slightly better perspective, it did beat the IBM ThinkPad X40's score of 134. What this means is that the Libretto will handle mainstream office applications quite happily, although it could struggle with anything too computationally or graphically demanding. That said, DVD playback was fine on this system. Battery life, as measured by MobileMark 2002 with the system running in desktop (full power) mode, came in at 3 hours and 16 minutes, which is pretty good. If you were to tighten up the power management settings and carry a spare battery, you could easily get a full day's mains-free work from this system.

The Libretto's tiny size gives it immediate appeal, but soon the inevitable trade-offs come to the fore. The high-resolution screen, although of brilliant quality, has such small pixels that text and icons are hard to make out unless you almost press your nose against the display. The keyboard is also likely to cause trouble for all but the most nimble-fingered. Our other niggle is the lack of extra connectors on the docking base. Overall, the U100, which comes with a generous three-year international warranty, is a great piece of design and engineering, and it makes a superb portable DVD player that also runs Windows XP and office applications should you need to do some work when on the road. Unfortunately, few business travellers will be able to justify purchasing it at £1,249 (ex. VAT) on that basis.


Packaged Quantity 1
Notebook type Ultraportable (Under 4 lbs.)
Processor / Chipset
CPU Intel Pentium M 753 / 1.2 GHz
Cache L2 - 2 MB
Power Efficiency Ultra Low Voltage (ULV)
Data Bus Speed 400 MHz
Chipset Type Intel 855GME
Features Enhanced SpeedStep technology, Execute Disable Bit capability, power-optimized processor system bus
Cache Memory
Type L2 cache
Installed Size 2 MB
Memory Speed 333 MHz
Memory Specification Compliance PC2700
Technology DDR SDRAM
Installed Size 512 MB
Rated Memory Speed 333 MHz
RAM 512 MB
Max Supported Size 1.25 GB
Technology DDR SDRAM
Speed 333 MHz / PC2700
Slots Qty 1
Empty Slots 0
Optical Drive DVD±RW / DVD-RAM
Type none
Read Speed 24x (CD) / 8x (DVD)
Type portable
Widescreen Display Yes
Monitor Features TruBrite
Diagonal Size (metric) 18.3 cm
Display Resolution Abbreviation WXGA
Environmental Parameters
Humidity Range Operating 20 - 80%
Hard Drive
Spindle Speed 4200 rpm
Type HDD
Capacity 60 GB
Audio & Video
Graphics Processor Intel Extreme Graphics 2
Memory Allocation Technology Dynamic Video Memory Technology 2.0
Sound Speaker, stereo speakers
Audio Codec AD1981B
Type AccuPoint, keyboard, touchpad
Wireless Protocol 802.11b/g, Bluetooth
Wired Protocol 10/100 Ethernet
Optical Storage
Drive Type DVD SuperMulti
CPU Type Pentium M
Processor Number 753
Manufacturer Intel
Clock Speed 1.2 GHz
Floppy Drive
Type none
Capacity 3400 mAh
Cells 6-cell
Technology lithium ion
Run Time (Up To) 5 hour(s)
Card Reader
Type card reader
Supported Flash Memory SD Memory Card
AC Adapter
Input AC 120/230 V (50/60 Hz)
Connections & Expansion
Slots 1 x memory (0 free)
1 x CardBus (1 free)
Interfaces 1 x display / video - VGA - 15 pin HD D-Sub (HD-15)
2 x USB 2.0 4 pin USB Type A
1 x IEEE 1394 (FireWire)
1 x headphones - output - mini-phone stereo 3.5 mm
1 x infrared IrDA
1 x network - Ethernet 10Base-T/100Base-TX - RJ-45
1 x modem - phone line - RJ-11
1 x docking / port replicator
Memory Card Reader Yes (SD Card)
Brand Toshiba
Product Line Toshiba Libretto
Model U105
Packaged Quantity 1
Compatibility PC
Notebook Type thin and light
Platform Windows
Hard Drive Capacity 60 GB
Diagonal Size 7.2 in
Data Link Protocol Bluetooth, Ethernet, Fast Ethernet, IEEE 802.11b, IEEE 802.11g
Wireless LAN Supported Yes
Dimensions & Weight
Width 8.3 in
Depth 6.5 in
Height 1.2 in
Manufacturer Warranty
Type 1 year warranty
Data Bus Speed 400 MHz
Chipset Type Intel 855GME
Physical Characteristics
Weight 2.2 lbs
Min Operating Temperature 41 °F
Max Operating Temperature 95 °F
Operating System / Software
OS Provided: Type Microsoft Windows XP Professional
Type AT&T WorldNet Service, Drivers & Utilities, InterVideo WinDVD 5, McAfee VirusScan (Trial), Microsoft Office OneNote, Microsoft Works, Sonic Solutions Drive Letter Access (DLA), Sonic Solutions RecordNow! Basic for Toshiba
Video Output
Graphics Processor Intel Extreme Graphics 2
Graphics Processor Series Intel Extreme Graphics 2
Video Memory
Memory Allocation Technology Dynamic Video Memory Technology 2.0
Service & Support
Type 1 year warranty
Service & Support Details
Type limited warranty
Service Included parts and labor
Full Contract Period 1 year