Le lundi 24 octobre 2011 à 15:16 -0400, Alex Deucher a écrit : > On Mon, Oct 24, 2011 at 3:01 PM, Xavier Bestel <xavier.bes...@free.fr> wrote: > > Hi, > > > > I know it may be off-topic, but the experience is there. > > I've just bought a used 30" monitor (HP ZR30w), and it doesn't display > > anything, even at BIOS time. The backlight is on, but I see nothing > > except a faint flickering at mode change times. Screen blanking works > > (the backlight switches off). I'm using a Radeon HD 5700 via DVI, > > debian/sid with kernel 3.1.0-rc7, Xorg 2:1.11.1.901-2 and radeon > > 1:6.14.2-2. > > After googling a bit, some people talk about a possible EDID problem > > (apparently it's possible to have the EDID somehow erased from the > > EEPROM ?). But Xorg.0.log does seem indicate that there's an EDID: > > > > [ 21.829] (II) RADEON(0): Monitor name: HP ZR30w > > [ 21.829] (II) RADEON(0): Serial No: CN4048041Z > > [ 21.829] (II) RADEON(0): EDID (in hex): > > [ 21.829] (II) RADEON(0): 00ffffffffffff0022f06e2801010101 > > [ 21.829] (II) RADEON(0): 3014010380402878ea8d85ad4f35b125 > > [ 21.829] (II) RADEON(0): 0e505400000001010101010101010101 > > [ 21.829] (II) RADEON(0): 010101010101e26800a0a0402e603020 > > [ 21.829] (II) RADEON(0): 360081902100001abc1b00a050201730 > > [ 21.829] (II) RADEON(0): 3020360081902100001a000000fc0048 > > [ 21.829] (II) RADEON(0): 50205a523330770a20202020000000ff > > [ 21.829] (II) RADEON(0): 00434e343034383034315a0a20200066 > > [ 21.829] (II) RADEON(0): Printing probed modes for output DVI-0 > > [ 21.829] (II) RADEON(0): Modeline "2560x1600"x60.0 268.50 2560 2608 > > 2640 2720 1600 1603 1609 1646 +hsync -vsync (98.7 kHz) > > [ 21.829] (II) RADEON(0): Modeline "1280x800"x59.9 71.00 1280 1328 > > 1360 1440 800 803 809 823 +hsync -vsync (49.3 kHz) > > > > ... and then: > > > > [ 21.854] (II) RADEON(0): Output DVI-0 using initial mode 2560x1600 > > > > Does anyone have an idea how I could pinpoint the problem ? > > The EDID looks ok to me. Do any other modes work? Try 1280x800. Try > the other DVI port. If the neither port lights up the monitor > (especially if the bios produces no display), it's probably a bad > monitor.
OK, thanks to you I've found the problems: 1) this monitor is apparently unable to display anything but 1280x800 or 2560x1600, so no BIOS nor GRUB for me. 2) my cable is single-link, so Xorg's default guess doesn't work. After hooking a second monitor, and choosing 1280x800 for the big one, everything's working (sort-of). I'll hunt for a dual-link or displayport cable, whichever is cheapest. Can Xorg/radeon detect that the DVI cable is single-link ? Thanks, Xav _______________________________________________ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com