Lubuntu 20.04 setting PCI HD5450 as default GPU
by uspi from LinuxQuestions.org on (#5DJCR)
Hello, I just installed Lubuntu 20.04 on my ancient AM2 HTPC from '07. It has onboard graphics GeForce 6150 and Radeon HD 5450 in PCI slot (yes PCI non express if that matters). Tested working in Win XP but I want to use Lubuntu.
OK I'm totally new to Linux checked that both of GPUs are recognized by the OS using
Code:lspci -k | grep -A 2 -i "VGA"
00:05.0 VGA compatible controller: NVIDIA Corporation C51PV [GeForce 6150] (rev a2)
Subsystem: ASUSTeK Computer Inc. A8N-VM CSM
Kernel driver in use: nouveau
--
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Park [Mobility Radeon HD 5430]
Subsystem: Hightech Information System Ltd. Caicos [Radeon HD 5450]
Kernel driver in use: radeonand used command glxinfo|egrep "OpenGL vendor|OpenGL renderer"
OpenGL vendor string: nouveau
OpenGL renderer string: NV4E
So the OS seems to be using the onboard graphics through VGA. I managed to get picture from the HD 5450 (uses HDMI) by going to BIOS and setting
Primary Display to PCI instead of onboard. The problem is I can see the Lubuntu logo loading using HD 5450 (removed VGA cable) but after that when it gets to the OS there's no video and I have to use VGA onboard graphics again and I get picture.
I have no idea how to set the PCI GPU as the main one. In Windows I just disabled the onboard GPU from device manager.
(OFF-TOPIC: If someone wonders why I'm using such low end PCI GPU instead of onboard I got it for free and it has HDMI output which I need for my TV)
OK I'm totally new to Linux checked that both of GPUs are recognized by the OS using
Code:lspci -k | grep -A 2 -i "VGA"
00:05.0 VGA compatible controller: NVIDIA Corporation C51PV [GeForce 6150] (rev a2)
Subsystem: ASUSTeK Computer Inc. A8N-VM CSM
Kernel driver in use: nouveau
--
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Park [Mobility Radeon HD 5430]
Subsystem: Hightech Information System Ltd. Caicos [Radeon HD 5450]
Kernel driver in use: radeonand used command glxinfo|egrep "OpenGL vendor|OpenGL renderer"
OpenGL vendor string: nouveau
OpenGL renderer string: NV4E
So the OS seems to be using the onboard graphics through VGA. I managed to get picture from the HD 5450 (uses HDMI) by going to BIOS and setting
Primary Display to PCI instead of onboard. The problem is I can see the Lubuntu logo loading using HD 5450 (removed VGA cable) but after that when it gets to the OS there's no video and I have to use VGA onboard graphics again and I get picture.
I have no idea how to set the PCI GPU as the main one. In Windows I just disabled the onboard GPU from device manager.
(OFF-TOPIC: If someone wonders why I'm using such low end PCI GPU instead of onboard I got it for free and it has HDMI output which I need for my TV)