<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BISECTED] nouveau, nv50: External VGA not detected anymore" href="https://bugs.freedesktop.org/show_bug.cgi?id=64904#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BISECTED] nouveau, nv50: External VGA not detected anymore" href="https://bugs.freedesktop.org/show_bug.cgi?id=64904">bug 64904</a> from <a class="email" href="mailto:joshuabaergen@gmail.com" title="Joshua Baergen <joshuabaergen@gmail.com>"> Joshua Baergen</a> <pre>I can confirm this issue on a ThinkPad W530, NVIDIA Corporation GK107GLM [Quadro K1000M] (rev a1). I noticed the issue at work when I tried to connect to VGA extender which in turn was hooked up to a projector. However, connecting directly to a VGA monitor worked fine. I took Gerhard's suggestion and patched my 2.8.13 Gentoo kernel with the nv50_dac_detect from ef22c8bb7b3fac45919b7fde412d36d1a8367d51 and I was then able to connect to the projector. FWIW, at least one other thing I noticed in the patch is that in the working code, there's the following sequence: 1) Write (NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern) to DAC_LOAD_CTRL(i). 2) Read DAC_LOAD_CTRL(i). 3) Write 0 to DAC_LOAD_CTRL(i). In the new code, it's: 1) Write (NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern) to DAC_LOAD_CTRL(i). 2) Write NV50_PDISPLAY_DAC_LOAD_CTRL_DONE to DAC_LOAD_CTRL(i). 3) Read DAC_LOAD_CTRL(i). Being completely unfamiliar with the hardware, I'm not sure if this is significant, and unfortunately, I don't have much (if any) opportunity to experiment. Josh</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>