https://www.thinkwiki.org/w/api.php?action=feedcontributions&feedformat=atom&user=Mm1 2026-05-16T15:44:20Z User contributions MediaWiki 1.31.12 https://www.thinkwiki.org/w/index.php?title=Talk:Problem_with_LCD_brightness_buttons&diff=37970 2008-06-12T13:48:08Z

<p>Mm1: /* Problem with LCD brightness buttons after suspend-to-ram */</p> <hr /> <div>== Problem with LCD brightness buttons after suspend-to-ram ==<br /> <br /> On my X60 1706-BM7, it's possible to suspend-to-ram either using s2ram or just &quot;echo mem &gt; /sys/power/state&quot;. There's a problem I've noticed, that after I resumed the machine, the LCD brightness buttons take longer to respond. Symptoms are:<br /> *Before suspending, whenever I press the LCD brightness up/down keys, the screen promptly respond by dimming or brighten up.<br /> *After resuming, whenever I press the same keys again, it takes about 1 sec. for the screen to dim or brighten up.<br /> *After resuming, if I use the command &quot;echo down &gt; /proc/acpi/ibm/brightness&quot; or &quot;echo up &gt; /proc/acpi/ibm/brightness&quot;, the screen will respond right away, just like before suspending.<br /> *Without suspending, using &quot;vbetool post&quot; doesn't give this behaviour.<br /> So I think this problem is related to the buttons itself. Does anyone have a similar experience? Any solutions? --[[User:WilliamPoetra|WilliamPoetra]] 10:55, 25 March 2007 (CST)<br /> <br /> Edit: According to Sebastian Schmidt, the delay goes away with BIOS 2.11 [http://mailman.linux-thinkpad.org/pipermail/linux-thinkpad/2007-July/039586.html]. I'll check it out.<br /> <br /> Edit: Nope, the problem doesn't go away.<br /> <br /> Edit: I have the same Problem on my T61.<br /> <br /> == Can't change brightness on T61 ==<br /> <br /> I'm using a T61 with linux kernel 2.6.21-5 and thinkpad-acpi module v.0.14. For the life of me I can't manage to change the LCD brightness. I've tried using both the thinkpad-acpi method under /proc/acpi/ibm/brightness and also the kernel acpi video method under /proc/acpi/video/VID/LCD0/brightness, but neither works. Nor do the Fn-Home and Fn-End keys work themselves.<br /> <br /> == X Reboot after changing brightness beyond limit X60 ==<br /> <br /> I am running Ubuntu Feisty <br /> $ uname -r<br /> 2.6.20-16-generic<br /> on an X60 1706-85G<br /> BIOS update is from May 2007<br /> <br /> After pressing the brightness up or down keys serveral times and passing the max low/high brightness limits the X server reboots:<br /> <br /> $ tail /var/log/syslog<br /> Jul 18 07:23:11 brasov gdm[6387]: gdm_slave_xioerror_handler: Schwerwiegender X-Fehler - :0 wird neu gestartet<br /> <br /> When I rmmod the video module as suggested the brightness keys do not work at all.<br /> <br /> In the Ubuntu boot splash screen the brightness keys work normally.<br /> <br /> Any suggestions?<br /> <br /> == VID vs VID1 ==<br /> <br /> This might or might not be related to the above problems, but on my T61 (intel video) using Debian Lenny, the fn-home and fn-end keys do not change the screen brightness. Some digging around shows that these keys do change /proc/acpi/video/VID/LCD0/brightness, which does not appear to affect the screen at all, while manually sending something to /proc/acpi/video/VID1/LCD1/brightness (note the 1 after VID) does have an effect on the screen. Now my problem remains figuring out how to configure these keys to work. I'm not even sure which piece of software is controlling them at this point. Any hints?</div>

Mm1 https://www.thinkwiki.org/w/index.php?title=Installation_instructions_for_the_ThinkPad_T61&diff=37700 2008-05-11T20:02:13Z

<p>Mm1: Archlinux link added</p> <hr /> <div>See also: General Thinkpad {{T61}} information and installation notes for the previous {{T60}}.<br /> <br /> ==Distribution Specific Instructions==<br /> <br /> === Debian ===<br /> <br /> * [http://ejahn.net/Members/eric/stories/t61_etch Installing Debian Etch Linux on a Thinkpad T61], 2007-10-13<br /> * [http://www.klabs.be/~fpiat/linux/debian/Etch_on_Thinkpad_T61.html Installing Debian/Linux Etch on a Thinkpad T61], 2007-05-22<br /> * {{Install|Debian| Lenny|T61}}<br /> <br /> === Ubuntu ===<br /> <br /> * {{Install|Ubuntu| 7.04 (Feisty Fawn)| T61}}<br /> * {{Install|Ubuntu| 7.10 (Gutsy Gibbon)| T61}}<br /> * {{Install|Ubuntu| 8.04 (Hardy Heron)| T61}}<br /> <br /> === Fedora ===<br /> <br /> * [http://carrot.hep.upenn.edu/wiki/doku.php?id=thinkpad:start Installing Fedora 7 x86_64] on a Thinkpad {{T61}} 15.4&quot; widescreen.<br /> * {{Install|Fedora| 7|T61}}, including Xen.<br /> * Useful forum post on [http://www.fedoraforum.org/forum/showthread.php?t=159516 Fedora 7 x86_64] installation. - Updated 7.8.2007 to include suspend<br /> * [http://lambda.uta.edu/T61/ Fedora 7 on a Lenovo ThinkPad T61]<br /> * [[Installing Fedora 8 on a T61]]<br /> <br /> === openSUSE / SUSE Linux ===<br /> * [[Installing Novell SLED 10sp1 on a Thinkpad T61]]<br /> * [[Installing openSUSE 10.3 Beta 2 on an Thinkpad T61]]<br /> * [[Installing openSUSE 10.3 Beta 1 on an IBM ThinkPad T61]]<br /> * [[Installing openSUSE 10.2 on an IBM ThinkPad T61]] - max X resolution in default install is 1024x768<br /> * [[Installing openSUSE 10.3 GM on a ThinkPad T61]]<br /> <br /> === Gentoo ===<br /> * Useful forum post on [http://forums.gentoo.org/viewtopic-t-567773-highlight-.html installation of Gentoo].<br /> * Gentoo-wiki's [http://gentoo-wiki.com/HARDWARE_Lenovo_Thinkpad_T61 Lenovo Thinkpad T61 hardware page].<br /> <br /> === Mandriva ===<br /> * [[Installing Mandriva 2008 x86-64 Powerpack on a Thinkpad T61]]<br /> <br /> === ArchLinux ===<br /> * [http://wiki.archlinux.org/index.php/IBM_Thinkpad_T61 Installing ArchLinux on a Thinkpad T61].<br /> <br /> ==General Instructions==<br /> <br /> * [http://www.linlap.com/wiki/IBM-Lenovo+Thinkpad+T61 A Linux compatibility guide to the Lenovo Thinkpad T61]</div>

Mm1