| Summary: | [ilk] Setting VGA to 1920x1200@60Hz causes WARN(loop in pipe configuration) | ||||||
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| Product: | DRI | Reporter: | Colin E <colin.e.uk> | ||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||
| Status: | CLOSED WORKSFORME | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||
| Severity: | normal | ||||||
| Priority: | medium | CC: | brian, intel-gfx-bugs | ||||
| Version: | unspecified | ||||||
| Hardware: | Other | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
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So two issues here: we apparently don't get the EDID over VGA in this config, and when trying to set a 19x12 mode, we fail in the mode set code. Can you build the drm-intel-nightly branch from git://anongit.freedesktop.org/drm-intel and boot it with drm.debug=6 and attach the dmesg? Then "dmesg -c" and try the mode set and attach the dmesg output from that failure? Colin, please attach the information requested in comment #1. Not sure i'm in a position to start building Xorg from scratch guys, i'm a user/administrator, not a developer i'm afraid. Given step by step instructions I can give it a go, but I suspect that would take an expert more time than doing the build themselves. (In reply to Colin E from comment #3) > Not sure i'm in a position to start building Xorg from scratch guys, i'm a > user/administrator, not a developer i'm afraid. Given step by step > instructions I can give it a go, but I suspect that would take an expert > more time than doing the build themselves. Note that you were requested to build a new kernel, not Xorg. Given that request was made several months ago, I believe testing with the lastest kernel release, 4.0, would be enough. I'm closing this bug due to inactivity, but please feel free to reopen if you can provide the information requested in comment 1 with kernel 4.0. |
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Created attachment 108259 [details] TGZ containing dmesg, xorg.conf (modified) and Xorg.0.log System environment: -- chipset: Intel Z97 -- system architecture: 64-bit -- xf86-video-intel: ? -- xserver: xorg-server 2:1.16.1-1 -- mesa: ? -- libdrm: 2.4.58-2 -- kernel:3.16-2-amd64 -- Linux distribution: SMP Debian 3.16.3-2 (2014-09-20) x86_64 GNU/Linux -- Machine or mobo model: MSI Z97M-G43 -- Display connector: VGA -- Monitor: Dell 2405FPW (24" 1920x1200) Reproducing steps: System is not picking up correct monitor resolutions via EDID. The only choices offered are: 1024x768, 800x600, 848x480, 640x480 (all at 60Hz) get-edid reports: "The EDID data should not be trusted as the VBE call failed" 1) Generate a new modeline with gtf $ gtf 1920 1200 60 # 1920x1200 @ 60.00 Hz (GTF) hsync: 74.52 kHz; pclk: 193.16 MHz Modeline "1920x1200_60.00" 193.16 1920 2048 2256 2592 1200 1201 1204 1242 -HSync +Vsync 2) Generate new Xorg.conf Go to a new virtual terminal (as root). $ service lightdm stop $ Xorg -configure /etc/X11/xorg.conf.current $ service lightdm start $ cp /etc/X11//etc/X11/xorg.conf.current xorg.conf 3) Edit Xorg.conf to add new modeline (copy attached) 4) Restart Xorg again (as in step 2) 5) Attempt to set new mode System sees newly defined mode- $ xrandr --current Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1920x1200_60 60.00 1024x768 60.00* 800x600 60.32 56.25 848x480 60.00 640x480 59.94 HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis) HDMI3 disconnected (normal left inverted right x axis y axis) Attempt to use new mode- $ xrandr --output VGA1 --mode "1920x1200_60" xrandr: Configure crtc 0 failed Additional info: Motherboard (MSI Z97M-G43) specifically states that the board supports up to 1920x1200@60Hz on the VGA port. dmesg includes the following error- [768761.630664] WARNING: CPU: 0 PID: 14759 at /build/linux-P15SNz/linux-3.16.3/drivers/gpu/drm/i915/intel_display.c:9696 __intel_set_mode+0x131f/0x1560 [i915]() (not sure if this is relevant)