| Summary: | [byt dsi] Wrong PLL on HP Pro Tablet 408 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | DRI | Reporter: | ettavolt | ||||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||
| Severity: | normal | ||||||||
| Priority: | medium | CC: | ettavolt, intel-gfx-bugs | ||||||
| Version: | XOrg git | ||||||||
| Hardware: | x86 (IA32) | ||||||||
| OS: | Linux (All) | ||||||||
| Whiteboard: | |||||||||
| i915 platform: | BYT | i915 features: | display/DSI | ||||||
| Attachments: |
|
||||||||
Created attachment 121736 [details]
intel_bios_reader /sys/kernel/debug/dri/0/i915_opregion (intel-gpu-tools 1.13)
Here is parsed video bios, if it helps.
Also, I've tried to hardcode
if (pll_div == 454 && p == 5) {
return 70220;
}
in vlv_get_dsi_pclk. This way I get rid of the error, but unfortunately don't get any picture.
(In reply to ettavolt from comment #1) > Created attachment 121736 [details] > intel_bios_reader /sys/kernel/debug/dri/0/i915_opregion (intel-gpu-tools > 1.13) > > Here is parsed video bios, if it helps. > > Also, I've tried to hardcode > if (pll_div == 454 && p == 5) { > return 70220; > } > in vlv_get_dsi_pclk. This way I get rid of the error, but unfortunately > don't get any picture. We seem to have neglected the bug a bit, apologies. ettavolt@gmail.com, since There were improvements pushed in kernel that will benefit to your system, so please re-test with latest kernel and mark as REOPENED if you can reproduce (and attach fresh gpu error dump & kernel log) and RESOLVED/* if you cannot reproduce. I was able to launch 4.10 kernel with live Ubuntu 17.04 beta without nomodeset param and get picture. Kernel log said, that 'i915 20161121 successfully initialized'. Date may not be exact. X loaded 'i965' (?) driver but was laggy as if there was no acceleration. Maybe I need to install the system actually before it will work correctly. But that's a story for a different bug. (In reply to ettavolt from comment #3) > I was able to launch 4.10 kernel with live Ubuntu 17.04 beta without > nomodeset param and get picture. Kernel log said, that 'i915 20161121 > successfully initialized'. Date may not be exact. > X loaded 'i965' (?) driver but was laggy as if there was no acceleration. > Maybe I need to install the system actually before it will work correctly. > But that's a story for a different bug. Thanks ettavolt |
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.
Created attachment 121091 [details] Log with drm.debug=14 on kernel command line. I'm trying to configure Ubuntu 15.10 on HP Pro Tablet 408 G1 (P/N: L3S95AA#ACB if anyone interested). It is based on Z3736F. Currently I'm stuck with problem in i915. It can't determine PLL divider (?). With nomodeset I can get to desktop and then xrandr reports this mode: 800 x 1280 (0x26e) 78.848MHz / 98.56kHz / 77 Hz. In the dmesg.log you can see modified '[drm:vlv_get_dsi_pclk [i915]] *ERROR* wrong m_seed programmed' message, because I thought I could get something useful out of pll_div value. :) Obviously, this was wrong. I've got picture on LCD connected to HDMI. 'Displays' applet showed both screens active with native resolution set, but tablet's screen was black. Will it help if I attach log for booting in such configuration? What debug level should I set?