Resolution for monitor is 1680x1050. Xorg -version X.Org X Server 1.9.4.901 (1.9.5 RC 1) Kernel : 2.6.38-ARCH (no patches, just logo changed) xorg radeon from git 2011-03-04. Using gallium. HW is a laptop acer 4820TG with intel-ati combo. It's not a regression. This never worked for me. Intel card detects monitor correctly.
Are you using switcheroo? Does the monitor work properly when you select the discrete card in the bios? I suspect the i2c mux is not getting swapped properly when you switch between the gpus.
Using vga_switcheroo. played with "xrandr --addmode" and 1680x1050 work, so it's a detection problem.
(In reply to comment #2) > Using vga_switcheroo. > > played with "xrandr --addmode" and 1680x1050 work, so it's a detection problem. The i2c mux is not getting swapped properly when you switch between the gpus.
(In reply to comment #2) > Using vga_switcheroo. > > played with "xrandr --addmode" and 1680x1050 work, so it's a detection problem. The i2c mux is not getting swapped properly when you switch between the gpus. There's probably some additional set of acpi calls needed for your system.
How can i help?
Created attachment 46383 [details] [review] possible fix Does this kernel patch help?
Patch works as expected.
Patch sent upstream.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.