在 Ubuntu 20.04 (Lenovo Thinkpad) 上，100% 的显示比例很小，200% 仍然很小

Ubuntu 不知道屏幕的大小，因此不知道它的像素密度。

例如，在 15" 屏幕上 100% 可能很小，但在具有相同分辨率的 32" 屏幕上 100% 就可以了。这就是为什么您可以手动更改缩放以适合您的屏幕尺寸的原因。

联想笔记本电脑的像素密度高于戴尔笔记本电脑。

解决方法

未启用小数比例时运行以下命令。

gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetCurrentState

例子：

$ gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetCurrentState
(uint32 7, [(('eDP-1-1', 'SDC', '0x4141', '0x00000000'), [('[email protected]', 1366, 768, 59.998008728027344, 1.0, [1.0, 2.0], {'is-preferred': <true>}), ('[email protected]', 1360, 768, 59.798992156982422, 1.0, [1.0, 2.0], {}), ('[email protected]', 1360, 768, 59.960025787353516, 1.0, [1.0, 2.0], {'is-current': <true>}), ('[email protected]', 1280, 720, 120.00162506103516, 1.0, [1.0, 2.0], {}), ('[email protected]', 1280, 720, 119.98211669921875, 1.0, [1.0, 2.0], {}), ('[email protected]', 1280, 720, 59.855125427246094, 1.0, [1.0, 2.0], {}), ('[email protected]', 1280, 720, 59.744712829589844, 1.0, [1.0, 2.0], {}), ('[email protected]', 1024, 768, 120.07466888427734, 1.0, [1.0], {}), ('[email protected]', 1024, 768, 60.003841400146484, 1.0, [1.0], {}), ('960x720@120', 960, 720, 120.0, 1.0, [1.0], {}), ('[email protected]', 928, 696, 120.101318359375, 1.0, [1.0], {}), ('[email protected]', 896, 672, 120.02888488769531, 1.0, [1.0], {}), ('[email protected]', 1024, 576, 119.90670776367188, 1.0, [1.0], {}), ('[email protected]', 1024, 576, 119.91866302490234, 1.0, [1.0], {}), ('[email protected]', 1024, 576, 59.899215698242188, 1.0, [1.0], {}), ('[email protected]', 1024, 576, 59.819515228271484, 1.0, [1.0], {}), ('[email protected]', 960, 600, 119.865478515625, 1.0, [1.0], {}), ('[email protected]', 960, 600, 119.99750518798828, 1.0, [1.0], {}), ('[email protected]', 960, 540, 119.92568969726562, 1.0, [1.0], {}), ('[email protected]', 960, 540, 119.97574615478516, 1.0, [1.0], {}), ('[email protected]', 960, 540, 59.6290283203125, 1.0, [1.0], {}), ('[email protected]', 960, 540, 59.818218231201172, 1.0, [1.0], {}), ('800x600@120', 800, 600, 120.0, 1.0, [1.0], {}), ('[email protected]', 800, 600, 60.316539764404297, 1.0, [1.0], {}), ('[email protected]', 800, 600, 56.25, 1.0, [1.0], {}), ('[email protected]', 840, 525, 120.01870727539062, 1.0, [1.0], {}), ('[email protected]', 840, 525, 119.76650238037109, 1.0, [1.0], {}), ('[email protected]', 864, 486, 59.91534423828125, 1.0, [1.0], {}), ('[email protected]', 864, 486, 59.5703125, 1.0, [1.0], {}), ('[email protected]', 800, 512, 120.33700561523438, 1.0, [1.0], {})], {'is-builtin': <true>, 'display-name': <'Built-in display'>})], [(0, 0, 1.0, uint32 0, true, [('eDP-1-1', 'SDC', '0x4141', '0x00000000')], @a{sv} {})], {'renderer': <'xrandr'>, 'layout-mode': <uint32 2>, 'global-scale-required': <true>, 'legacy-ui-scaling-factor': <1>, 'max-screen-size': <(16384, 16384)>})
$

从上面的结果中，请注意，在输出“（unit32 7”）的开头，值 7 会发生变化，这非常重要。请注意您的情况下的值。

接下来阅读具有许多不同值的常见模式..像这样

'[email protected]', 1366, 768, 59.998008728027344, 1.0, [1.0, 2.0]

[email protected]:模式 ID
1366 :物理像素的宽度
768:物理像素的高度
59.998008728027344:刷新率
1.0:根据计算的首选
[1.0, 2.0]比例:上述模式支持的比例( [email protected])

这意味着在可用模式之外..（根据输出有很多模式）如果您选择[email protected]此模式..您只有两个可用的比例[1.0, 2.0]

现在启用小数比例并再次运行命令..

$ gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetCurrentState
(uint32 7, [(('eDP-1-1', 'SDC', '0x4141', '0x00000000'), [('[email protected]', 1366, 768, 59.998008728027344, 1.0, [1.0, 2.0], {'is-preferred': <true>}), ('[email protected]', 1360, 768, 59.798992156982422, 1.0, [1.0, 1.2307692766189575, 1.4545454978942871, 1.7777777910232544, 2.0], {}), ('[email protected]', 1360, 768, 59.960025787353516, 1.0, [1.0, 1.2307692766189575, 1.4545454978942871, 1.7777777910232544, 2.0], {'is-current': <true>}), ('[email protected]', 1280, 720, 120.00162506103516, 1.0, [1.0, 1.25, 1.5094339847564697, 1.7391303777694702, 2.0], {}), ('[email protected]', 1280, 720, 119.98211669921875, 1.0, [1.0, 1.25, 1.5094339847564697, 1.7391303777694702, 2.0], {}), ('[email protected]', 1280, 720, 59.855125427246094, 1.0, [1.0, 1.25, 1.5094339847564697, 1.7391303777694702, 2.0], {}), ('[email protected]', 1280, 720, 59.744712829589844, 1.0, [1.0, 1.25, 1.5094339847564697, 1.7391303777694702, 2.0], {}), ('[email protected]', 1024, 768, 120.07466888427734, 1.0, [1.0, 1.2487804889678955, 1.4970760345458984], {}), ('[email protected]', 1024, 768, 60.003841400146484, 1.0, [1.0, 1.2487804889678955, 1.4970760345458984], {}), ('960x720@120', 960, 720, 120.0, 1.0, [1.0, 1.25, 1.5], {}), ('[email protected]', 928, 696, 120.101318359375, 1.0, [1.0, 1.2473118305206299], {}), ('[email protected]', 896, 672, 120.02888488769531, 1.0, [1.0, 1.251396656036377], {}), ('[email protected]', 1024, 576, 119.90670776367188, 1.0, [1.0, 1.2799999713897705, 1.4883720874786377], {}), ('[email protected]', 1024, 576, 119.91866302490234, 1.0, [1.0, 1.2799999713897705, 1.4883720874786377], {}), ('[email protected]', 1024, 576, 59.899215698242188, 1.0, [1.0, 1.2799999713897705, 1.4883720874786377], {}), ('[email protected]', 1024, 576, 59.819515228271484, 1.0, [1.0, 1.2799999713897705, 1.4883720874786377], {}), ('[email protected]', 960, 600, 119.865478515625, 1.0, [1.0, 1.25, 1.5], {}), ('[email protected]', 960, 600, 119.99750518798828, 1.0, [1.0, 1.25, 1.5], {}), ('[email protected]', 960, 540, 119.92568969726562, 1.0, [1.0, 1.25, 1.5], {}), ('[email protected]', 960, 540, 119.97574615478516, 1.0, [1.0, 1.25, 1.5], {}), ('[email protected]', 960, 540, 59.6290283203125, 1.0, [1.0, 1.25, 1.5], {}), ('[email protected]', 960, 540, 59.818218231201172, 1.0, [1.0, 1.25, 1.5], {}), ('800x600@120', 800, 600, 120.0, 1.0, [1.0, 1.25], {}), ('[email protected]', 800, 600, 60.316539764404297, 1.0, [1.0, 1.25], {}), ('[email protected]', 800, 600, 56.25, 1.0, [1.0, 1.25], {}), ('[email protected]', 840, 525, 120.01870727539062, 1.0, [1.0, 1.25], {}), ('[email protected]', 840, 525, 119.76650238037109, 1.0, [1.0, 1.25], {}), ('[email protected]', 864, 486, 59.91534423828125, 1.0, [1.0, 1.2558139562606812], {}), ('[email protected]', 864, 486, 59.5703125, 1.0, [1.0, 1.2558139562606812], {}), ('[email protected]', 800, 512, 120.33700561523438, 1.0, [1.0, 1.2799999713897705], {})], {'is-builtin': <true>, 'display-name': <'Built-in display'>})], [(0, 0, 1.0, uint32 0, true, [('eDP-1-1', 'SDC', '0x4141', '0x00000000')], @a{sv} {})], {'renderer': <'xrandr'>, 'layout-mode': <uint32 3>, 'supports-changing-layout-mode': <true>, 'x11-fractional-scaling': <true>, 'legacy-ui-scaling-factor': <1>, 'max-screen-size': <(16384, 16384)>})
$

这次再次观察线条，

'[email protected]', 1360, 768, 59.960025787353516, 1.0, [1.0, 1.2307692766189575, 1.4545454978942871, 1.7777777910232544, 2.0]

请注意，现在可用的比例已更改。这意味着您可以从上面的输出中设置 1.23........ 或 1.45........ 或 1.77....... 或 2.0

由于我的笔记本电脑是 1366x768，它可用的比例尺较少。但是当我将它连接到我的 4K 电视时。我将有更多可用的比例尺。在你的情况下。你的笔记本电脑是高像素的，你会有更多的选择所需的分辨率3840x2168

所以首先运行命令

gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetCurrentState

并记下这些值

例如：

1. 7在上面命令的输出开始处的 Unit32 7

2. [email protected]在首选模式下，适合几乎所需的规模

我的要求的示例行：

('[email protected]', 1360, 768, 59.798992156982422, 1.0, [1.0, 1.2307692766189575, 1.4545454978942871, 1.7777777910232544, 2.0]

3. 1.7777777910232544是我喜欢的可用比例，例如..

4. eDP-1-1这是我的显示器 在你的情况下改变这个。

现在设置比例，在您的情况下，您肯定会有 2.25 或 2.50 几乎等效的值。编辑以下命令以适合您的值。

gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.ApplyMonitorsConfig 7 1 "[(0, 0, 1.7777777910232544, 0, true, [('eDP-1-1', '[email protected]', [] )] )]" "[]"

上述命令和源码的解释可以参考https://unix.stackexchange.com

成功的命令示例：下面的 gif 无法准确显示，但在我的情况下结果很好..