如何检查EDID是否可以进行微管

Question

read-edid给了我一条消息：“不应该信任EDID数据，因为VBE调用失败了”。没关系，但我想知道，这些数据是不可靠的，另一种方式，因为我不能在我们的系统上使用read。就我个人而言，我可以找到学习Xorg.log的方法，但这将是一种非常不恰当的方式。

有一种检查EDID数据可靠性的好方法吗？

Answer 1

试试xrandr --verbose。它也展示了原始的、真实的细节。

Answer 2

你也可以试试monitor-edid。主页描述了用于访问EDID的各种方法。我发现它比read-edid更灵活、更可靠。它也有一些不错的输出选项。

通过VBE：

monitor-get-edid-using-vbe | monitor-parse-edid

parsing EDID from /sys/class/drm/card0-LVDS-1/edid
EISA ID: CMO1574
EDID version: 1.3
EDID extension blocks: 0
Screen size: 34.4 cm x 19.3 cm (15.53 inches, aspect ratio 16/9 = 1.78)
Gamma: 2.2
Digital signal

    # Monitor preferred modeline (60.0 Hz vsync, 55.5 kHz hsync, ratio 16/9, 118 dpi)
    ModeLine "1600x900" 97.75 1600 1648 1680 1760 900 903 908 926 -hsync -vsync

通过KMS (perl dumper格式)：

monitor-edid -v --perl
(
parsing EDID from /sys/class/drm/card0-LVDS-1/edid
+{
          'EISA_ID' => 'CMO1574',
          'checksum' => 25,
          'detailed_timings' => [
                                  {
                                    'ModeLine' => '"1600x900" 97.75 1600 1648 1680 1760 900 903 908 926 -hsync -vsync',
                                    'ModeLine_comment' => '# Monitor preferred modeline (60.0 Hz vsync, 55.5 kHz hsync, ratio 16/9, 118 dpi)',
                                    'digital_composite' => 3,
                                    'horizontal_active' => 1600,
                                    'horizontal_blanking' => 160,
                                    'horizontal_border' => 0,
                                    'horizontal_dpi' => '118.139534883721',
                                    'horizontal_image_size' => 344,
                                    'horizontal_sync_offset' => 48,
                                    'horizontal_sync_positive' => 0,
                                    'horizontal_sync_pulse_width' => 32,
                                    'interlaced' => 0,
                                    'pixel_clock' => '97.75',
                                    'preferred' => 1,
                                    'stereo' => 0,
                                    'vertical_active' => 900,
                                    'vertical_blanking' => 26,
                                    'vertical_border' => 0,
                                    'vertical_dpi' => '118.445595854922',
                                    'vertical_image_size' => 193,
                                    'vertical_sync_offset' => 3,
                                    'vertical_sync_positive' => 0,
                                    'vertical_sync_pulse_width' => 5
                                  }
                                ],
          'diagonal_size' => '15.5292379824145',
          'edid_revision' => 3,
          'edid_version' => 1,
          'established_timings' => [],
          'extension_flag' => 0,
          'feature_support' => {
                                 'DPMS_active_off' => 0,
                                 'DPMS_standby' => 0,
                                 'DPMS_suspend' => 0,
                                 'GTF_compliance' => 0,
                                 'has_preferred_timing' => 1,
                                 'rgb' => 0,
                                 'sRGB_compliance' => 0
                               },
          'file' => '/sys/class/drm/card0-LVDS-1/edid',
          'gamma' => 120,
          'manufacturer_name' => 'CMO',
          'max_size_horizontal' => '34.4',
          'max_size_precision' => 'mm',
          'max_size_vertical' => '19.3',
          'monitor_details' => '',
          'monitor_text' => [
                              'N156O6-L01',
                              'CMO',
                              'N156O6-L01'
                            ],
          'product_code' => 5492,
          'ratio' => '1.78238341968912',
          'ratio_name' => '16/9',
          'ratio_precision' => 'mm',
          'serial_number' => 0,
          'standard_timings' => [],
          'video_input_definition' => {
                                        'composite_sync' => 0,
                                        'digital' => 1,
                                        'separate_sync' => 0,
                                        'sync_on_green' => 0,
                                        'voltage_level' => 0
                                      },
          'week' => 41,
          'year' => 2008
        }
,
)