15-rc1: radeon modesetting fails

[Borislav Petkov]

Hi guys,

so I'm booting 15-rc1 + tip/master and around the time modesetting gets
initialized, the screen blanks and on it appears a message from the
monitors:

"The current input timing is not supported by the monitor display.
Please change your input timing to 1920x1200 at 60Hz or any other monitor
listed timing as per the monitor specifications."

The box is still responsive, I can reboot it with Ctrl-Alt-Del but
screens are blank.

If I boot with radeon.modeset=0, I see the normal nomodeset big letters
on the console and not very optimal screen resolution.

Diffing drm init chatter from dmesg shows only this:

--- /tmp/working        2014-04-15 08:40:21.979985352 +0200
+++ /tmp/b0rked 2014-04-15 08:40:11.983985364 +0200
@@ -44,4 +44,5 @@
 [drm]    pitch is 7680
 fbcon: radeondrmfb (fb0) is primary device
 radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
-[drm] Initialized radeon 2.37.0 20080528 for 0000:01:00.0 on minor 0
+[drm] Initialized radeon 2.38.0 20080528 for 0000:01:00.0 on minor 0
+

Below is the whole thing, btw.

Anyway, if you guys have any ideas, I'm all ears. Otherwise, would a quick
bisect on the 59 patches touching drivers/gpu/drm/radeon/ make sense?

git log --oneline v3.14.. drivers/gpu/drm/radeon/ | wc -l
59

Thanks.

[drm] Initialized drm 1.1.0 20060810
[drm] radeon kernel modesetting enabled.
[drm] initializing kernel modesetting (RV635 0x1002:0x9598 0x1043:0x01DA).
[drm] register mmio base: 0xFEA20000
[drm] register mmio size: 65536
[drm] Detected VRAM RAM=512M, BAR=256M
[drm] RAM width 128bits DDR
[drm] radeon: 512M of VRAM memory ready
[drm] radeon: 512M of GTT memory ready.
[drm] Loading RV635 Microcode
[drm] Internal thermal controller without fan control
[drm] radeon: power management initialized
[drm] GART: num cpu pages 131072, num gpu pages 131072
[drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
[drm] radeon: irq initialized.
[drm] ring test on 0 succeeded in 0 usecs
[drm] ib test on ring 0 succeeded in 0 usecs
[drm] Radeon Display Connectors
[drm] Connector 0:
[drm]   DVI-I-1
[drm]   HPD1
[drm]   DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c
[drm]   Encoders:
[drm]     DFP1: INTERNAL_UNIPHY
[drm]     CRT2: INTERNAL_KLDSCP_DAC2
[drm] Connector 1:
[drm]   DIN-1
[drm]   Encoders:
[drm]     TV1: INTERNAL_KLDSCP_DAC2
[drm] Connector 2:
[drm]   DVI-I-2
[drm]   HPD2
[drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[drm]   Encoders:
[drm]     CRT1: INTERNAL_KLDSCP_DAC1
[drm]     DFP2: INTERNAL_KLDSCP_LVTMA
[drm] fb mappable at 0xC0141000
[drm] vram apper at 0xC0000000
[drm] size 9216000
[drm] fb depth is 24
[drm]    pitch is 7680
fbcon: radeondrmfb (fb0) is primary device
radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[drm] Initialized radeon 2.38.0 20080528 for 0000:01:00.0 on minor 0

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--