使用带有 XFCE 的 Ubuntu 18.04，带有 ATI Radeon Kaveri 显卡（集成在主板上）。
我在 VGA 端口上连接了 1 个屏幕，并尝试在 HDMI 端口上添加 1 台电视。
我无法使用 XFCE 显示设置或 xrandr 命令行工具更改分辨率。
如果我只插入 VGA 屏幕，则使用其原始分辨率：1920x1080。
如果我插入 VGA 屏幕和 HDMI 电视，则显示将以 640x480 的分辨率镜像到两个屏幕上。
在这两种情况下，Xorg 日志都显示 Xorg 加载了 Radeon 驱动程序，但 fbdev 驱动程序声明了显卡，因此 Radeon 驱动程序被卸载。我猜那里有问题？
仅限 VGA 屏幕的信息
印西-F
System: Host: faivre-desktop Kernel: 4.15.0-32-generic x86_64 bits: 64 Desktop: Xfce 4.12.3
Distro: Ubuntu 18.04.1 LTS
Machine: Device: desktop System: Gigabyte product: N/A serial: N/A
Mobo: Gigabyte model: F2A78M-HD2 v: x.x serial: N/A BIOS: American Megatrends v: FB date: 04/27/2015
CPU: Quad core AMD A8-7600 Radeon R7 10 Compute Cores 4C+6G (-MCP-) cache: 8192 KB
clock speeds: max: 3100 MHz 1: 1522 MHz 2: 1423 MHz 3: 1396 MHz 4: 1396 MHz
Graphics: Card: Advanced Micro Devices [AMD/ATI] Kaveri [Radeon R7 Graphics]
Display Server: x11 (X.Org 1.19.6 ) drivers: fbdev,ati (unloaded: modesetting,vesa,radeon)
Resolution: [email protected]
OpenGL: renderer: llvmpipe (LLVM 6.0, 128 bits) version: 3.3 Mesa 18.0.5
Audio: Card-1 Advanced Micro Devices [AMD] FCH Azalia Controller driver: snd_hda_intel
Card-2 Advanced Micro Devices [AMD/ATI] Kaveri HDMI/DP Audio Controller driver: snd_hda_intel
Sound: Advanced Linux Sound Architecture v: k4.15.0-32-generic
Network: Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169
IF: eth1 state: down mac: 40:8d:5c:0b:07:9a
Card-2: Ralink RT2501/RT2573 Wireless Adapter driver: rt73usb
IF: wlan0 state: N/A mac: N/A
Drives: HDD Total Size: 1000.2GB (93.9% used)
ID-1: /dev/sda model: SAMSUNG_HD502HI size: 500.1GB
ID-2: /dev/sdb model: WDC_WD5000AAJS size: 500.1GB
Partition: ID-1: / size: 125G used: 111G (94%) fs: ext4 dev: /dev/sda6
ID-2: swap-1 size: 1.88GB used: 0.00GB (0%) fs: swap dev: /dev/sda5
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 34.4C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 200 Uptime: 3 min Memory: 527.2/6912.5MB Client: Shell (bash) inxi: 2.3.56
兰德
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected 1920x1080+0+0 0mm x 0mm
1920x1080 77.00*
修改
Module Size Used by
ccm 20480 3
pci_stub 16384 1
vboxpci 24576 0
vboxnetadp 28672 0
vboxnetflt 28672 0
vboxdrv 471040 3 vboxnetadp,vboxnetflt,vboxpci
binfmt_misc 20480 1
nls_iso8859_1 16384 1
arc4 16384 2
rt73usb 32768 0
rt2x00usb 20480 1 rt73usb
rt2x00lib 53248 2 rt73usb,rt2x00usb
mac80211 778240 2 rt2x00lib,rt2x00usb
edac_mce_amd 28672 0
kvm_amd 86016 0
joydev 24576 0
input_leds 16384 0
cfg80211 622592 2 rt2x00lib,mac80211
kvm 593920 1 kvm_amd
crc_itu_t 16384 1 rt73usb
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
pcbc 16384 0
aesni_intel 188416 2
aes_x86_64 20480 1 aesni_intel
snd_hda_codec_realtek 94208 1
crypto_simd 16384 1 aesni_intel
glue_helper 16384 1 aesni_intel
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_codec_hdmi 49152 1
snd_hda_intel 40960 4
snd_hda_codec 126976 4 snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_hda_core 81920 5 snd_hda_intel,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 98304 4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
k10temp 16384 0
fam15h_power 16384 0
snd_seq 65536 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_seq,snd_pcm
snd 81920 19 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_hda_codec_realtek,snd_pcm
mac_hid 16384 0
shpchp 36864 0
soundcore 16384 1 snd
sch_fq_codel 20480 6
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,parport_pc,ppdev
ip_tables 28672 0
x_tables 40960 1 ip_tables
autofs4 40960 2
pata_acpi 16384 0
hid_generic 16384 0
chash 16384 0
i2c_algo_bit 16384 0
ttm 106496 0
drm_kms_helper 172032 0
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
i2c_piix4 24576 0
pata_atiixp 16384 0
ahci 36864 4
drm 401408 2 ttm,drm_kms_helper
libahci 32768 1 ahci
r8169 86016 0
mii 16384 1 r8169
hid_cherry 16384 0
video 45056 0
usbhid 49152 0
hid 118784 4 hid_generic,usbhid,hid_cherry
Xorg.0.log
带 VGA 屏幕和 HDMI 电视的信息
印西-F
System: Host: faivre-desktop Kernel: 4.15.0-32-generic x86_64 bits: 64
Desktop: Xfce 4.12.3 Distro: Ubuntu 18.04.1 LTS
Machine: Device: desktop System: Gigabyte product: N/A serial: N/A
Mobo: Gigabyte model: F2A78M-HD2 v: x.x serial: N/A
BIOS: American Megatrends v: FB date: 04/27/2015
CPU: Quad core AMD A8-7600 Radeon R7 10 Compute Cores 4C+6G (-MCP-)
cache: 8192 KB
clock speeds: max: 3100 MHz 1: 1742 MHz 2: 1446 MHz 3: 1397 MHz 4: 1396 MHz
Graphics: Card: Advanced Micro Devices [AMD/ATI] Kaveri [Radeon R7 Graphics]
Display Server: x11 (X.Org 1.19.6 )
drivers: fbdev,ati (unloaded: modesetting,vesa,radeon)
Resolution: [email protected]
OpenGL: renderer: llvmpipe (LLVM 6.0, 128 bits) version: 3.3 Mesa 18.0.5
Audio: Card-1 Advanced Micro Devices [AMD] FCH Azalia Controller
driver: snd_hda_intel
Card-2 Advanced Micro Devices [AMD/ATI] Kaveri HDMI/DP Audio Controller
driver: snd_hda_intel
Sound: Advanced Linux Sound Architecture v: k4.15.0-32-generic
Network: Card: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
driver: r8169
IF: eth1 state: down mac: 40:8d:5c:0b:07:9a
Drives: HDD Total Size: 1000.2GB (93.9% used)
ID-1: /dev/sda model: SAMSUNG_HD502HI size: 500.1GB
ID-2: /dev/sdb model: WDC_WD5000AAJS size: 500.1GB
Partition: ID-1: / size: 125G used: 111G (94%) fs: ext4 dev: /dev/sda6
ID-2: swap-1 size: 1.88GB used: 0.00GB (0%) fs: swap dev: /dev/sda5
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 25.4C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 199 Uptime: 1 min Memory: 478.9/6912.5MB
Client: Shell (bash) inxi: 2.3.56
兰德
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 640 x 480, maximum 640 x 480
default connected 640x480+0+0 0mm x 0mm
640x480 73.00*
修改
Module Size Used by
pci_stub 16384 1
vboxpci 24576 0
vboxnetadp 28672 0
vboxnetflt 28672 0
vboxdrv 471040 3 vboxnetadp,vboxnetflt,vboxpci
binfmt_misc 20480 1
nls_iso8859_1 16384 1
input_leds 16384 0
edac_mce_amd 28672 0
joydev 24576 0
kvm_amd 86016 0
kvm 593920 1 kvm_amd
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
pcbc 16384 0
aesni_intel 188416 0
aes_x86_64 20480 1 aesni_intel
snd_hda_codec_realtek 94208 1
crypto_simd 16384 1 aesni_intel
glue_helper 16384 1 aesni_intel
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_codec_hdmi 49152 1
snd_hda_intel 40960 4
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_hda_codec 126976 4 snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_rawmidi 32768 1 snd_seq_midi
snd_hda_core 81920 5 snd_hda_intel,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_hwdep 20480 1 snd_hda_codec
fam15h_power 16384 0
k10temp 16384 0
snd_pcm 98304 4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi
snd_seq 65536 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_seq,snd_pcm
snd 81920 19 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_hda_codec_realtek,snd_pcm
shpchp 36864 0
soundcore 16384 1 snd
mac_hid 16384 0
sch_fq_codel 20480 2
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,parport_pc,ppdev
ip_tables 28672 0
x_tables 40960 1 ip_tables
autofs4 40960 2
pata_acpi 16384 0
hid_generic 16384 0
chash 16384 0
i2c_algo_bit 16384 0
ttm 106496 0
drm_kms_helper 172032 0
syscopyarea 16384 1 drm_kms_helper
hid_cherry 16384 0
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
pata_atiixp 16384 0
fb_sys_fops 16384 1 drm_kms_helper
ahci 36864 4
i2c_piix4 24576 0
drm 401408 2 ttm,drm_kms_helper
r8169 86016 0
libahci 32768 1 ahci
mii 16384 1 r8169
video 45056 0
usbhid 49152 0
hid 118784 4 hid_generic,usbhid,hid_cherry
Xorg.0.log
答案1
最后发现这是由于旧的设置造成的：
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
在/etc/default/grub
我删除了该nomodeset选项，运行sudo update-grub并重新启动，然后使用 Radeon 模块，我可以更改每个屏幕的分辨率。