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Re: [Libreboot] lcd-panel 1440x900 not working (external monitor ok)

From: Leah Rowe
Subject: Re: [Libreboot] lcd-panel 1440x900 not working (external monitor ok)
Date: Wed, 27 Jul 2016 18:14:27 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.8.0

Hash: SHA1

you can try the latest unstable release of libreboot and report
whether that works (it should do, and this also means you're testing a
release candidate. we're working on a release). We mostly ignore
reports for 20150518 libreboot version because it's quite out of date
now and the unstable releases are being tested for release.

Op 27/07/16 om 17:24 schreef Marcel Maci:
> Hello, I flashed my Thinkpad T400 yesterday (with last stable
> release 20150518). Everything works (like a charm!), but not my
> LCD-screen: it's 1440x900 and I read on the compatibility list that
> "some" of the lcd-panels with higher resolution (I suppose higher
> than 1280x800?) can fail in Libreboot (apparently mine does). When
> I boot the Thinkpad up, I quickly get a backlight flicker (which
> turns then off permanently) and no GRUB, no GNU/Linux. But I can
> use an external monitor which works fine. My question is: is the
> only way to solve this issue that I replace the lcd-panel (by one
> which has 1280x800 resolution) or can I try to flash a newer
> (experimental) version of Libreboot. Thanks for your answer - I
> also post the results of "xrandr --props" in case it helps to
> answer the question. Marcel
> Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 32767 x
> 32767 LVDS1 connected (normal left inverted right x axis y axis) 
> EDID: 00ffffffffffff0030ae364000000000 
> 00120103801e1378ea4b859257568a28 20505400000001010101010101010101 
> 010101010101b027a08051841a303020 360030be100000197021a09851841a30 
> 3020360030be100000190000000f0095 0a32950a28191900320c3c01000000fe 
> 004c503134315750322d544c4231001f BACKLIGHT: 0 range: (0, 15) 
> Backlight: 0 range: (0, 15) scaling mode: Full aspect supported:
> None, Full, Center, Full aspect 1440x900       60.2 +   59.9
> 50.0 1360x768       59.8     60.0 1152x864       60.0 1024x768
> 60.0 800x600        60.3     56.2 640x480        59.9 VGA1
> connected primary 1680x1050+0+0 (normal left inverted right x axis
> y axis) 474mm x 296mm EDID: 00ffffffffffff0004720e00eb196083 
> 24120103082f1e78eade95a3544c9926 0f5054bfef90a940714f81408bc09500 
> 950f9040010121399030621a274068b0 3600da2811000019000000fd00384d1f 
> 5411000a202020202020000000ff004c 41573043303032383633310a000000fc 
> 0050323231570a202020202020200057 1680x1050      60.0*+ 1600x1200
> 60.0 1400x1050      60.0 1280x1024      75.0 1440x900       75.0
> 59.9 1280x960       60.0 1360x768       59.8 1152x864       75.0 
> 1024x768       75.1     70.1     60.0 832x624        74.6 800x600
> 72.2     75.0     60.3     56.2 640x480        75.0     72.8
> 66.7     60.0 720x400        70.1 DP1 disconnected (normal left
> inverted right x axis y axis) Broadcast RGB: Automatic supported:
> Automatic, Full, Limited 16:235 audio: auto supported: force-dvi,
> off, auto, on VIRTUAL1 disconnected (normal left inverted right x
> axis y axis)

- -- 
Leah Rowe

Libreboot developer

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