在某些应用程序（如 Opera 浏览器）中，文件对话框显示方块而不是字符。我正在使用 XFce。到处都使用 Ubuntu-Regular 字体，并且始终以 UTF-8 编码。我读到过某处说这是 XFce 的问题，因为它选择了错误的字体，但我找不到解决方案。有人知道如何解决这个问题吗？
它看起来像这样：
根据评论的要求，这是 inxi -Fxxxz 的输出
System: Host: GarromMachine Kernel: 4.15.0-30-generic x86_64
bits: 64 gcc: 7.3.0
Desktop: Xfce 4.12.3 (Gtk 2.24.31) info: xfce4-panel dm: lightdm
Distro: Ubuntu 18.04.1 LTS
Machine: Device: laptop System: LENOVO product: 80EW v: Lenovo B50-80 serial: N/A
Mobo: LENOVO model: Lenovo B50-80 v: SDK0J40700 WIN serial: N/A
UEFI [Legacy]: LENOVO v: A8CN47WW(V3.00) date: 07/14/2015
Chassis: type: 10 v: Lenovo B50-80 serial: N/A
Battery BAT1: charge: 28.5 Wh 100.0% condition: 28.5/28.5 Wh (100%)
volts: 15.9/14.4
model: 4C 47 43 00 31 31 7E 0F 7E 003041344C33314C Li-ion serial: <filter>status: Full cycles: 0
CPU: Dual core Intel Pentium 3825U (-MT-MCP-)
arch: Broadwell rev.4 cache: 2048 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 7582
clock speeds: min/max: 500/1900 MHz 1: 1057 MHz 2: 969 MHz
3: 959 MHz 4: 805 MHz
Graphics: Card: Intel HD Graphics bus-ID: 00:02.0 chip-ID: 8086:1606
Display Server: x11 (X.Org 1.19.6 )
drivers: modesetting (unloaded: fbdev,vesa)
Resolution: [email protected]
OpenGL: renderer: Mesa DRI Intel Broadwell GT1
version: 4.5 Mesa 18.1.3 (compat-v: 3.0) Direct Render: Yes
Audio: Card-1 Intel Broadwell-U Audio Controller
driver: snd_hda_intel bus-ID: 00:03.0 chip-ID: 8086:160c
Card-2 Intel Wildcat Point-LP High Def. Audio Controller
driver: snd_hda_intel bus-ID: 00:1b.0 chip-ID: 8086:9ca0
Sound: Advanced Linux Sound Architecture v: k4.15.0-30-generic
Network: Card-1: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
driver: r8169 v: 2.3LK-NAPI port: 3000
bus-ID: 08:00.0 chip-ID: 10ec:8168
IF: enp8s0 state: down mac: <filter>
Card-2: Intel Wireless 3160
driver: iwlwifi bus-ID: 09:00.0 chip-ID: 8086:08b4
IF: wlp9s0 state: up mac: <filter>
Drives: HDD Total Size: 500.1GB (5.0% used)
ID-1: /dev/sda model: ST500LT012 size: 500.1GB
serial: <filter> temp: 36C
Partition: ID-1: / size: 111G used: 20G (19%) fs: ext4 dev: /dev/sda5
ID-2: swap-1 size: 4.21GB used: 0.00GB (0%)
fs: swap dev: /dev/sda6
RAID: System: supported: N/A
No RAID devices: /proc/mdstat, md_mod kernel module present
Unused Devices: none
Sensors: System Temperatures: cpu: 39.0C mobo: 39.0C
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 203 Uptime: 22 min Memory: 1269.1/3864.4MB
Init: systemd v: 237 runlevel: 5 default: 2 Gcc sys: 7.3.0 alt: 5
Client: Shell (bash 4.4.191 running in xfce4-terminal) inxi: 2.3.56