Messages in this thread | | | From | "Brown, Len" <> | Subject | RE: [3.4 regression] [bisected] DisplayPort fails to come on | Date | Thu, 14 Jun 2012 21:52:48 +0000 |
| |
Wouter, Please test the latest patch here:
https://bugzilla.kernel.org/show_bug.cgi?id=43168
thanks, Len Brown, Intel Open Source Technology Center
> > When I cold boot 3.4 on my laptop the second monitor attached to the > > displayport stays blank. It works fine with 3.3.8 and earlier. > > > > I get two error messages in dmesg: > > > > kernel: video: probe of LNXVIDEO:00 failed with error -5 > > > > kernel: [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, > > aborting > > > > When I warm boot 3.4 after running kernel 3.3.8 first, only the first > > message appears and the display works fine. > > > > A bisection based on the occurrence of the first error message > > resulted in > > > > Author: Igor Murzov <intergalactic.anonymous@gmail.com> 2012-03-30 > > 18:32:08 > > Committer: Len Brown <len.brown@intel.com> 2012-03-30 20:44:05 > > Parent: c16fa4f2ad19908a47c63d8fa436a1178438c7e7 (Linux 3.3) > > Branches: linux-3.4.y, remotes/origin/linux-3.4.y, > > remotes/origin/master > > Follows: v3.3 > > Precedes: v3.4-rc1 > > > > ACPI video: Harden video bus adding. > > > > It is always better to check return values, so add some new checks > > and > > correct existing ones. > > > > v2: Be consistent and don't mix errors from -E* and AE_* namespaces. > > > > Signed-off-by: Igor Murzov <e-mail@date.by> > > Signed-off-by: Len Brown <len.brown@intel.com> > > > > > > The laptop is a Dell System XPS L702X/0XN71K, BIOS A17 02/22/2012. It > > has two graphics card in Optimus configuration: > > 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation > > Core Processor Family Integrated Graphics Controller (rev 09) > > 01:00.0 VGA compatible controller: NVIDIA Corporation Device 124d (rev > > a1) > > > > I only use the Intel card (which drives the DP port if I am not > > mistaken) > > > > I hope this is helpful. Please let me know what I can do next to track > > this problem down. > > > > With kind regards, > > > > Wouter Koolen -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |