Hi, I got my old VGA card black/blank display when using Ubuntu 24.04. On Windows 10 it is work perfectly on 1440p (2K) resolution.
Here is my VGA card:
$ lspci -k -d ::03xx
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] │
Subsystem: Bitland(ShenZhen) Information Technology Co., Ltd. Radeon HD 6450
Kernel driver in use: radeon
Kernel modules: radeon, amdgpu
This old card correctly use radeon driver instead of newer amdgpu driver. I also can confirm driver is works well by executing DRI_PRIME=1 glxgears while monitoring Radeon GPU usage with radeontop utility.
But still monitor will be blank if change from onboard Intel GPU (i915) to Radeon GPU on PCIe interface. 😭
After days of googling, go to forums, try and error. ChatGPT is life saver 😃
Here options need to grub config /etc/default/grub to fix those issue:
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX_DEFAULT="radeon.si_support=1 radeon.cik_support=1 amdgpu.si_support=0 amdgpu.cik_support=0 radeon.dpm=0 radeon.audio=0 radeon.modeset=1"
It now my monitor can display 2560x1440p (2K) again. yay…🎉
