Created attachment 120554 [details] Yorg.0.log, no screen section available The driver does not load correctly and therefore the LVDS is not being recognized. I do get a dark [not black] screen after boot. With help of a second monitor I managed to get a screen I can work with. I used the setting "radeon.modeset=0" to get it. No xorg.conf has been created. The machine is a Sony Vaio VGN-CR11Z/R (x64). Running: Archlinux 4.2.3-1 x86_64 The mobility Radeon X2300 seems to belong to r600 according to Xorg.0.log, though radeonwiki says r500. lspci says RV516/M64. That is a bit unhelpful. Xorg.0.log says: compiled for (Server) 1.18.0, module version = (Version) 7.6.1
Please attach your dmesg output with the radeon kernel driver loaded.
Created attachment 120568 [details] dmesg minor information removed
Created attachment 120569 [details] journalctl minor information removed
The LVDS is detected as an 1280x800 panel. Does it seem like a backlight issue? Is this a regression? If so when did it used to work? Can you try setting radeon.backlight=0 on the kernel command line in grub to disable driver backlight control. You might be seeing a regression as a result of this patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4281f46ef839050d2ef60348f661eb463c21cc2e which was fixed in: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4cee6a9057d5e13911f0cb6e143d11dc1a3245dd http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ae93580ee59c02395c1711d3e6b90546b8137b86
Created attachment 120572 [details] Xorg.0.log of debian live system, older kernel
(In reply to Alex Deucher from comment #4) > The LVDS is detected as an 1280x800 panel. Does it seem like a backlight > issue? Is this a regression? I think so. > If so when did it used to work? It worked with older kernel versions. To give an example, I attached the Xorg.0.log of a debianoid live system with older kernel, driver and Xorg server. > Can you try > setting radeon.backlight=0 on the kernel command line in grub to disable > driver backlight control. You might be seeing a regression as a result of > this patch: > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > ?id=4281f46ef839050d2ef60348f661eb463c21cc2e > which was fixed in: > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > ?id=4cee6a9057d5e13911f0cb6e143d11dc1a3245dd > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > ?id=ae93580ee59c02395c1711d3e6b90546b8137b86 Will try and set in jiffy.
Created attachment 120574 [details] Xorg.0.log with radeon.backlight=0
(In reply to Alex Deucher from comment #4) It worked with older kernel versions. To give an example, I attached the Xorg.0.log of a debianoid live system with older kernel, driver and Xorg server > Can you try > setting radeon.backlight=0 on the kernel command line in grub to disable > driver backlight control. You might be seeing a regression as a result of This did not work. Output attached.
Created attachment 120575 [details] dmesg.radeon.backlight=0
(In reply to Alex Deucher from comment #4) > You might be seeing a regression as a result of > this patch: > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > ?id=4281f46ef839050d2ef60348f661eb463c21cc2e > which was fixed in: > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > ?id=4cee6a9057d5e13911f0cb6e143d11dc1a3245dd > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > ?id=ae93580ee59c02395c1711d3e6b90546b8137b86 Does reverting these help? If not, can you bisect?
I would like to try this, but unfortunately this is beyond my capacity atm. I need to learn what to do first. Can you give me a link/resource, so I can try reverting these? I would need basic explanation of what I'm doing. I might be able to try with a friend, perhaps. =P
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