<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - LVDS blank screen on GM45" href="https://bugs.freedesktop.org/show_bug.cgi?id=94825#c13">Comment # 13</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - LVDS blank screen on GM45" href="https://bugs.freedesktop.org/show_bug.cgi?id=94825">bug 94825</a> from <a class="email" href="mailto:rob@solution-space.com" title="Rob Kramer <rob@solution-space.com>"> Rob Kramer</a> <pre>Some things I could try: 1) Override broken panel type via module parameter. 2) Disable VBT via module parameter, force use of existing mode. 3) Use video=.. parameter to lookup matching VBT panel. I've tried option 1, hack panel_type to 15 in intel_bios.c, and that works: [ 4.770027] [drm:intel_lvds_init] using mode from VBT: [ 4.770030] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 0 148500 1920 2040 2080 2200 1080 1081 1092 1125 0x8 0xa [ 4.770033] [drm:intel_lvds_init] detected dual-link lvds configuration Option 2 also works (hack out VBT setting), but results in messy kernel warnings/backtraces about pipe state mismatches, see previously attached logs. I don't know if option 3 is too horrible to consider. I've applied your patch to 4.5 (with minor port), but it returns too early at: ret = acpi_video_get_edid(acpidev, ACPI_VIDEO_DISPLAY_LCD, -1, &edid); if (ret < 0) return ret; Could my kernel be missing some ACPI stuff? There is CONFIG_ACPI_VIDEO=m, and the module is loaded. I didn't add a new boot log since there wasn't anything new. If you have some ideas on how to debug this, please let me know (I know very little about ACPI)..</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>