<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [sdvo lvds regression] "Use &intel_sdvo->ddc instead of intel_sdvo->i2c for DDC"" href="https://bugs.freedesktop.org/show_bug.cgi?id=65524#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [sdvo lvds regression] "Use &intel_sdvo->ddc instead of intel_sdvo->i2c for DDC"" href="https://bugs.freedesktop.org/show_bug.cgi?id=65524">bug 65524</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>Using the EDID: requested: Modeline 0:"1024x600" 60 44700 1024 1034 1066 1194 600 612 616 624 0x48 0xa preferred input: Modeline 0:"1024x600" 60 44700 1024 1034 1066 1194 600 612 616 624 0x48 0xa adjusted: Modeline 0:"1024x600" 60 178800 1024 1034 1066 1194 600 612 616 624 0x48 0xa -> refclk=120000, clock=(.m1=14, .m2=7, n=4, .p1=1, .p2=10), computed dotclock = 178000 [broken] with pixel_multiplier=2: refclk=120000, clock=(.m1=14, .m2=7, n=2, .p1=3, .p2=10), computed dotclock = 89000 [works] Using VBT: request: Modeline 0:"1024x600" 60 50500 1024 1034 1066 1348 600 612 616 624 0x48 0xa preferred input: Modeline 0:"1024x600" 60 50500 1024 1034 1066 1348 600 612 616 624 0x48 0xa adjusted: Modeline 0:"1024x600" 60 101000 1024 1034 1066 1348 600 612 616 624 0x48 0xa -> refclk=120000, clock=(.m1=16, .m2=9, n=2, .p1=3, .p2=10), computed dotclock = 101000 [works] with pixel_multiplier=4: -> refclk=120000, clock=(.m1=13, .m2=7, n=3, .p1=1, .p2=10), computed dotclock = 201600 [broken] The bspec is very clear in that the allowable dotclock range for sDVO is 100-225MHz on Ironlake. So I have no idea why either the forced pixel_multiplier=2 works for the EDID mode, nor why it fails with pixel_multiplier=4. I also distrust the VBT modes, on other machines they are garbage. It is a less than satisfactory situation.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>