<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [byt dsi] No image on WinBook TW700 tablet's DSI display after DRM initializes" href="https://bugs.freedesktop.org/show_bug.cgi?id=89704#c11">Comment # 11</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [byt dsi] No image on WinBook TW700 tablet's DSI display after DRM initializes" href="https://bugs.freedesktop.org/show_bug.cgi?id=89704">bug 89704</a> from <a class="email" href="mailto:calcprogrammer1@gmail.com" title="Adam Honse <calcprogrammer1@gmail.com>"> Adam Honse</a> <pre>I've been reading through this older bug report that documents a similar issue: <a href="https://bugzilla.kernel.org/show_bug.cgi?id=68451">https://bugzilla.kernel.org/show_bug.cgi?id=68451</a> I installed the Ubuntu PPA 3.13 kernel and started with video=VGA-1:800x1280e. With this, the Intel framebuffer does display and I can launch an X server with xinit. Once the X server starts however, the display becomes mangled. I can see that it is rendering (if I run glxgears) but only because random pixels are changing. If I switch VT back to another terminal the screen is readable again. It appears that xinit is setting the mode to 1024x768 for some reason. I then did the following to set an 800x1280 mode manually: adam@Adam-WinBook:~$ xrandr --display :0 Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.00* 800x600 60.32 56.25 848x480 60.00 640x480 59.94 HDMI1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) adam@Adam-WinBook:~$ xrandr --display :0 --newmode "800x1280" 100.56 800 832 1208 1240 1280 1306 1319 1345 adam@Adam-WinBook:~$ xrandr --display :0 --addmode VGA1 800x1280 adam@Adam-WinBook:~$ xrandr --display :0 --output VGA1 --mode 800x1280 Now the display is correct and I can run "glxinfo | grep renderer" and see Bay Trail and run glxgears. Is there any information I can gather about the panel from this setup that would help in determining the issues it has on the newer kernels? I'll post a dmesg and Xorg.0.log for this as well.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>