On Wed, Apr 2, 2014 at 4:43 AM, Bo Lorentsen <b...@moch.dk> wrote: > On 04/01/2014 05:38 PM, Shuduo Sang wrote: > > >> >> On Tue, Apr 1, 2014 at 10:21 PM, Bo Lorentsen <b...@moch.dk <mailto: >> b...@moch.dk>> wrote: >> >> On 04/01/2014 04:15 PM, Shuduo Sang wrote: >> >> Hi Bo, >> >> Can you post your .config? >> >> But of cause :-) please note that this is the default for Debian >> Jessie (3.14rc7 amd64), I have not changed anything. >> >> /BL >> >> >> Interesting. I encountered a similar issue on a Lenovo laptop and has >> been fixed by the patch which mentioned >> in http://marc.info/?l=linux-acpi&m=137568804802772&w=2. So I thought >> latest vanilla kernel tree should contains the patch. >> > While looking at the latest 3.14 kernel release (just released yesterday), > it looks like something like it are present : > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/ > linux.git/tree/drivers/gpu/drm/i915/intel_panel.c?id=refs/tags/v3.14#n513 > > It seems like they just added other max values, but basically it looks > like it is there ? >
I tried to install Debian Jessie and clone latest linus's git tree then reuse debian's config file of /boot to compile 3.14 kernel. The brightness works good at my side. > > /BL > >> >> >> Shuduo >> >> >> >> On Tue, Apr 1, 2014 at 9:17 PM, Bo Lorentsen <b...@moch.dk >> <mailto:b...@moch.dk> <mailto:b...@moch.dk <mailto:b...@moch.dk>>> >> >> wrote: >> >> Hi ... >> >> Now that my X1C are working I am quite happy about it, and >> now I >> am looking at the details. >> >> When I boot the laptop (Debian Jessie + 3.14rc7 + Shuduo's >> patch) >> I end up in a blank screen, the only way to get anywhere is to >> suspend it and resume, and then i have a beautiful login >> screen, >> and the laptop works nicely until next reboot. >> >> In the dmesg i get the following remarks : >> >> [ 1.605320] thinkpad_acpi: ThinkPad BIOS GRET32WW (1.09 >> ), EC >> unknown >> [ 1.605322] thinkpad_acpi: Lenovo ThinkPad X1 Carbon >> 2nd, model >> 20A7005LMD >> [ 1.607060] thinkpad_acpi: Unsupported brightness >> interface, >> please contact ibm-acpi-devel@lists.sourceforge.net >> <mailto:ibm-acpi-devel@lists.sourceforge.net> >> <mailto:ibm-acpi-devel@lists.sourceforge.net >> >> <mailto:ibm-acpi-devel@lists.sourceforge.net>> >> >> [ 1.607142] thinkpad_acpi: unknown version of the HKEY >> interface: 0x200 >> [ 1.607198] thinkpad_acpi: please report this to >> ibm-acpi-devel@lists.sourceforge.net >> <mailto:ibm-acpi-devel@lists.sourceforge.net> >> <mailto:ibm-acpi-devel@lists.sourceforge.net >> >> <mailto:ibm-acpi-devel@lists.sourceforge.net>> >> >> >> I know the HKEY problem is worked on, but could the >> "brightness >> interface" problem be related to the blank screen after >> boot problem ? >> >> /BL >> >> >> >> >> >
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