我无法在登录屏幕选择 Wayland，这可能是驱动程序问题吗？
lspci -v
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Caicos XT [Radeon HD 7470/8470 / R5 235/310 OEM] (prog-if 00 [VGA controller])
Subsystem: Dell Radeon HD 7470
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f6020000 (64-bit, non-prefetchable) [size=128K]
I/O ports at e000 [size=256]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: radeon
Kernel modules: radeon
lsmod |grep radeon
radeon 1470464 33
i2c_algo_bit 16384 1 radeon
ttm 94208 1 radeon
drm_kms_helper 167936 1 radeon
drm 356352 13 radeon,ttm,drm_kms_helper
dpkg --get-selections |grep wayla
gnome-session-wayland install
kwayland-data install
kwayland-integration:amd64 install
libkf5waylandclient5:amd64 install
libqt5waylandclient5:amd64 install
libqt5waylandcompositor5:amd64 install
libva-wayland1:amd64 install
libwayland-bin install
libwayland-client0:amd64 install
libwayland-cursor0:amd64 install
libwayland-dev:amd64 install
libwayland-egl1-mesa:amd64 install
libwayland-server0:amd64 install
qtwayland5:amd64 install
xwayland install