Hi group, I didn't know what to put in the subject header...
Anyway, I've got an ATI Radeon 9000 Mobility (ATI Radeon Mobility M9 Lf (AGP)) with a Samsung LTN150P1-L02 TFT panel at 1400x1050. When I start X, I only get a black screen on my panel. I tried everything I could think of, but it doesn't work. Using vesafb and fbdev works up to 1400x1050x16, but that's it. I disabled vesafb completely (compiled a _lot_ of different kernel versions) but that didn't work. Radeonfb doesn't work (I only get a garbled screen, even for vga=normal, in which I see parts of tux flying by) either. Totally disabling the framebuffer and using the ati/radeon driver doesn't work. Giving the modeline found with vesafb @1400x1050x16 but not using the framebuffer, does not work, etc. What _does_ work, however, is starting X while making sure that _no_ external monitor is connected. I get a black screen. Then, plug in the monitor and switch between TFT/CRT twice. If I'm fast enough, my monitor doesn't even come up (it doesn't support 1400x1050 anyway) but my laptop panel does. I then have a fully working DRI enabled set up and can play tuxracer, chromium, view DVDs, etc. However, if I exit X, I have to unplug the monitor, etc. I haven't tried suspending... Of course, I tried to run xvidtune to get the sync frequencies, but the graphical screen tells me the dot clock, as well as the sync frequencies, are all zero. On the command line, it blurts out the values specified by me in the modeline, which may actually be correct (how would I know?) but don't enable the panel (since I need the external monitor trick). How on earth can I enable my TFT panel? How do I find out the sync values? Is that the problem or is there something with the radeon driver? The 9000 reportedly works on many systems, but not on this specific panel (I found more with trouble using google, one with the external monitor trick, none with a working setup). Also, the X log says at one point "Using BIOS provided dividers" (for res 1400x1050). Could that be a problem? Should I update my BIOS? Samsung doesn't have datasheets with the information I seek, maybe I should drop them a mail? Also, read-edid doesn't work on my panel (call failed). Is this a problem? Sorry for the length of this mail (at least I didn't attach all my logs, ;-) but I'm completely at a loss here... Thanks, David -- Hi! I'm a .signature virus. Copy me into your ~/.signature to help me spread!
