Just like almost any GPU made by ATI, it needs proprietary blobs to have working 3D.

lspci -vmmnn

Slot:	01:05.0
Class:	VGA compatible controller [0300]
Vendor:	Advanced Micro Devices [AMD] nee ATI [1002]
Device:	RS482 [Radeon Xpress 200M] [5975]
SVendor:	Acer Incorporated [ALI] [1025]
SDevice:	Device [009f]

lspci -nnk

01:05.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI RS482 [Radeon Xpress 200M] [1002:5975]
	Subsystem: Acer Incorporated [ALI] Device [1025:009f]
	Kernel driver in use: radeon
	Kernel modules: radeon, radeonfb

01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS482M [Mobility Radeon Xpress 200] (prog-if 00 [VGA controller])
	Subsystem: Acer Incorporated [ALI] Device 009f
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 66 (2000ns min), Cache Line Size: 32 bytes
	Interrupt: pin A routed to IRQ 17
	Region 0: Memory at c0000000 (32-bit, prefetchable) [size=256M]
	Region 1: I/O ports at 9000 [size=256]
	Region 2: Memory at b0100000 (32-bit, non-prefetchable) [size=64K]
	[virtual] Expansion ROM at b0120000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: radeon

lspci -vvnnk

01:05.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] RS482M [Mobility Radeon Xpress 200] [1002:5975] (prog-if 00 [VGA controller])
	Subsystem: Acer Incorporated [ALI] RS482M [Mobility Radeon Xpress 200] [1025:009f]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 66 (2000ns min), Cache Line Size: 32 bytes
	Interrupt: pin A routed to IRQ 17
	NUMA node: 0
	Region 0: Memory at c8000000 (32-bit, prefetchable) [size=128M]
	Region 1: I/O ports at 9000 [size=256]
	Region 2: Memory at c0100000 (32-bit, non-prefetchable) [size=64K]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [50] Power Management version 2
		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: radeon
	Kernel modules: radeon

glxheads

  Display:     0x5646a8fb0d10
  Window:      0xc00002
  Context:     0x5646a8fcb3a0
  GL_VERSION:  3.1 Mesa 19.1.0
  GL_VENDOR:   VMware, Inc.
  GL_RENDERER: llvmpipe (LLVM 8.0, 128 bits)