When I install the M3, found the gnome-shell can't start cause the "No 3D hardware support".
After compare with 12.1(12.1 works fine), I found the the firmware not loaded.

Below is part of dmesg. Hope it'll be helpful.

[    7.950968] [drm] radeon: 64M of VRAM memory ready
[    7.950971] [drm] radeon: 512M of GTT memory ready.
[    7.950988] [drm] GART: num cpu pages 131072, num gpu pages 131072
[    7.951732] [drm] radeon: ib pool ready.
[    7.951807] [drm] radeon: 1 quad pipes, 1 Z pipes initialized.
[    7.953286] [drm] PCIE GART of 512M enabled (table at 0x00000000C0040000).
[    7.953312] radeon 0000:01:00.0: WB enabled
[    7.953316] [drm] fence driver on ring 0 use gpu addr 0xa0000000 and cpu addr 0xff88b000
[    7.953381] [drm] Loading R300 Microcode
[    7.960830] rtc_cmos 00:06: RTC can wake from S4
[    7.960991] rtc_cmos 00:06: rtc core: registered rtc_cmos as rtc0
[    7.961028] rtc0: alarms up to one month, y3k, 114 bytes nvram, hpet irqs
[    8.024211] radeon_cp: Failed to load firmware "radeon/R300_cp.bin"
[    8.024222] [drm:r100_cp_init] *ERROR* Failed to load firmware!
[    8.024228] radeon 0000:01:00.0: failed initializing CP (-2).
[    8.024233] radeon 0000:01:00.0: Disabling GPU acceleration
[    8.024240] [drm] radeon: cp finalized
[    8.024267] radeon 0000:01:00.0: f7227000 unpin not necessary
[    8.024673] radeon 0000:01:00.0: f7227200 unpin not necessary
[    8.024907] [drm] Panel ID String: 1024x768
[    8.024909] [drm] Panel Size 1024x768
[    8.035882] [drm] radeon legacy LVDS backlight initialized
[    8.035924] [drm] Radeon Display Connectors