@ Pako re comment #213 - I think you answered that question yourself in comment #197.
What is the output of lspci -vvnn on that computer? And what is the output of "glxinfo |grep render" (without the quotation marks) from Lubuntu and from Ubuntu? Please attach the information to this bug report (try to avoid pasting it into a comment if at all possible). Note that to run glxinfo you will need to first install the mesa-utils package.
@ Pako re comment #213 - I think you answered that question yourself in comment #197.
What is the output of lspci -vvnn on that computer? And what is the output of "glxinfo |grep render" (without the quotation marks) from Lubuntu and from Ubuntu? Please attach the information to this bug report (try to avoid pasting it into a comment if at all possible). Note that to run glxinfo you will need to first install the mesa-utils package.