Created attachment 431788 [details] Xorg log when the problem is happening Description of problem: I saw the new testing kernel kernel-2.6.34.1-11.fc13 which had some nouveau fixes and so tried it on a Dell Precision T7500 machine here that's recently had some instability, seemingly caused by the video drivers. With that kernel, the boot sequence proceeds normally. However, when X starts, only one of the two monitors switches to "graphics" mode - the other one is on but only shows a static cursor in the top left-hand corner. The monitors applet shows the second monitor as being on. The mouse cursor on the other monitor (the one that's working normally) is also hardly visible at all. Version-Release number of selected component (if applicable): xorg-x11-drv-nouveau-0.0.16-7.20100423git13c1043.fc13.x86_64 How reproducible: Every time Steps to Reproduce: 1. startx with 2 monitors connected via DP-DVI adapters 2. 3. Actual results: Expected results: Additional info:
Created attachment 431790 [details] lspci -v output
Created attachment 431791 [details] dmesg output while the problem is happening
I should add that I have another very similar machine that isn't in production yet and so can be used for extensive testing, if necessary.
Ah, this is something I couldn't test. My DP->DVI adaptors are too chunky to fit two of them at once. Can you boot with "log_buf_len=1M drm.debug=14 nouveau.reg_debug=0x0200" and re-post your dmesg, I'll see what I can tell from that. Thanks!
Created attachment 432019 [details] dmesg with extra detail, as requested Here's the dmesg output with those boot parameters
In case it's useful, the second monitor showed some of the text console output when I switched back to X.
Ah, I think "nouveau.reg_debug=0x0200" got missed off your boot options :)
Oops. Actually, it was there but on the next line in grub.conf (owing to the way I pasted it) and so was probably ignored. New version attached. Sorry about that.
Created attachment 432341 [details] dmesg with full nouveau debug setting
Is there anything else I can try? The user who had the original problem is back on the Nvidia driver because it's currently the only way of using both his monitors. However, it's crashing unpredictably, necessitating a reboot... I do have an almost identical machine available for testing, the only different being it has 56xx CPUs instead of 55xx - the graphics card is the same.
Can you give this build a try: http://koji.fedoraproject.org/koji/taskinfo?taskID=2405849
Just tried it. There's something strange going on as even though the monitors detect a signal at boot, none of the BIOS screens show up. Anyway, the Plymouth boot screen showed up on the right-hand monitor, which is connected to the right-hand card socket (looking from the front of the machine). However, logging in seemingly didn't complete - there's just a black screen with the X cursor.
Created attachment 441006 [details] dmesg with suggested test kernel
kernel-2.6.34.6-47.fc13 has been submitted as an update for Fedora 13. https://admin.fedoraproject.org/updates/kernel-2.6.34.6-47.fc13
kernel-2.6.34.6-47.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.