Tested with Trisquel 7, but marked as 6 since it is still missing from the OS list. Works fine.

lspci -vmmnn

Slot:	00:02.0
Class:	VGA compatible controller [0300]
Vendor:	Intel Corporation [8086]
Device:	Mobile 4 Series Chipset Integrated Graphics Controller [2a42]
SVendor:	ASUSTeK Computer Inc. [1043]
SDevice:	Device [1862]
Rev:	07

lspci -vvnnk

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
	Subsystem: Dell Mobile 4 Series Chipset Integrated Graphics Controller [1028:02aa]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 16
	Region 0: Memory at f6c00000 (64-bit, non-prefetchable) [size=4M]
	Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
	Region 4: I/O ports at efe8 [size=8]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
		Address: 00000000  Data: 0000
	Capabilities: [d0] Power Management version 3
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: i915
	Kernel modules: i915

lspci -nnk

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 09)
Subsystem: Lenovo Device [17aa:3a02]
Kernel driver in use: i915
Kernel modules: i915

glxheads

  Display:     0x564f5b5a6920
  Window:      0xc00002
  Context:     0x564f5b5c5c20
  GL_VERSION:  2.1 Mesa 18.3.6
  GL_VENDOR:   Intel Open Source Technology Center
  GL_RENDERER: Mesa DRI Mobile Intel GM45 Express Chipset 

My computer Acer Aspire 5736Z was working perfect with this videocard with some old trisquel version. However, at Trisquel 5.5 and 6 appeared a problem which left the screen black. nomodeset kernel parameter was leaving the computer usable, but aspect relation was erroneous and it was a pain to watch the screen. I found a solution. Set the parameter "acpi_osi=" in grub connfiguration file and increase brightness pressing brightness buttons after booting and the light will be returned. I'm using succesfully this on Trisquel 6.0 and I can use the laptop comfortably and with 3D acceleration.

GMA X4500: wikipedia link

The GMA X4500 and the GMA X4500HD for desktop were launched in June 2008. The GMA X4500 is used in the G43 chipset[16] and the GMA X4500HD is used in the G45 chipset. The GMA X4500 is also used in the G41 chipset, which was released in September 2008.

The GMA 4500MHD for laptops was launched on July 16, 2008. Featurewise, the 4500MHD is identical to its desktop cousin, the X4500HD. It had been previously rumored that a cost-reduced version, the GMA 4500, was to be launched in late 2008 or early 2009 and was to be used in the upcoming Q43 and Q45 chipsets. But in practice the Q43 and Q45 Chipsets also use the GMA X4500.

The difference between the GMA X4500 and the GMA X4500HD is that the GMA X4500HD is capable of "full 1080p high-definition video playback, including Blu-ray disc movies".

Like the X3500, X4500 supports DirectX 10 and Shader Model 4.0 features. Intel designed the GMA X4500 to be 200% faster than the GMA 3100 (G33 chipset) in 3DMark06 performance and 70% faster than the GMA X3500 (G35 chipset)