sudo apt-get install mesa results in:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package mesa
lspci -k | grep VGA -A2
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti PRO [Radeon HD 7950/8950 OEM / R9 280]
Subsystem: XFX Pine Group Inc. Device 3221
Kernel driver in use: fglrx_pci
