Re: default resolution on distro boot
On Mon, Jan 23, 2012 at 03:47:10PM -0700, mik...@softhome.net wrote: Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). There is a functionality called EDID (Extended Display Identification Data) which most display devices implement. Basically, one can ask the display for what capabilities it has and then set the display to the most suitable values. To see what your display reports, try installing the read-edid package, then run $ $RUNASROOT get-edid | parse-edid | $PAGER (where $RUNASROOT is whatever command you prefer to run 'get-edid' as root. 'sudo', 'fakeroot', 'su -c' etc) You should get a page of information telling you the manufacturer, model etc of the display plus a list of modes it claims to support. It MAY BE that native is not in that list (unlikely, but it has happened), in which case you'll need to tell X to ignore it's autodetected resolution and give it a modeline, just like in the old days :) -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/courier.4f1de36e.1...@softhome.net -- Darac Marjal -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120124131620.ga24...@darac.org.uk
Re: default resolution on distro boot
Am Montag, 23. Januar 2012 schrieb mik...@softhome.net: Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). I suggest to you reading: TVs are all awful Matthew Garrett http://mjg59.dreamwidth.org/8705.html as well as the linked postings Why EDID is not trustworthy for DPI Adam Jackson http://lists.fedoraproject.org/pipermail/devel/2011-October/157671.html Matthew Garrett http://lists.fedoraproject.org/pipermail/devel/2011-October/157760.html And then just stick to setting the resolution *manually*. I know the latter are related to DPI and thus also how TVs report physical size. But at least in the Blog by Matthew Garrett are also hints, while resolutions would not be reported correctly. The actual implementation as well as partly also specification for DDC appears to contain quite some crap it seems. Manufacturers of TVs do not seem to care much about reporting correct values in order of cheap, cheap, cheap. That is at least what I gathered from above mentioned reading. Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201201241547.09969.mar...@lichtvoll.de
Re: default resolution on distro boot
Am Dienstag, 24. Januar 2012 schrieb Darac Marjal: On Mon, Jan 23, 2012 at 03:47:10PM -0700, mik...@softhome.net wrote: Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). [… EDID …] You should get a page of information telling you the manufacturer, model etc of the display plus a list of modes it claims to support. It MAY BE that native is not in that list (unlikely, but it has happened), in which case you'll need to tell X to ignore it's autodetected resolution and give it a modeline, just like in the old days :) For getting modelines try cvt or gtf: martin@merkaba:~ cvt 1920 1080 60 # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz Modeline 1920x1080_60.00 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync martin@merkaba:~ gtf 1280 1024 60 # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline 1280x1024_60.00 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201201241549.11264.mar...@lichtvoll.de
default resolution on distro boot
Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/courier.4f1de36e.1...@softhome.net
Re: default resolution on distro boot
On 24/01/12 09:47, mik...@softhome.net wrote: Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). What do you mean by doesn't work correctly? You probably should not expect the same display quality on a tv display as a PC display. Are they all using the same driver[*1], have you cycled through all the modes they support[*2], does your graphics card support all the modes your display is capable of, etc. [*2]Ctrl++, Ctrl--, or xrandr The actual model of your television will allow you to find out what it's capable of - unless the display shows errors you could presume that it is being detected properly, just not the same RRate/Resolution/driver. Please post the Debian information. Use pastebin.debian.net (or pastebinit). [*1]/var/log/Xorg.0.log $ lspci | grep VGA and any warnings, errors, or fails from dmesg Cheers -- Iceweasel/Firefox extensions for finding answers to Debian questions:- https://addons.mozilla.org/en-US/firefox/collections/Scott_Ferguson/debian/ NOTE: new update available for Debian Buttons (New button for querying Debian Developer Package):- https://addons.mozilla.org/en-US/firefox/addon/debian-buttons/ -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4f1df6c5.5080...@gmail.com
Re: default resolution on distro boot
On 24 January 2012 08:47, mik...@softhome.net wrote: Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). Can you please clarify which build of Debian you're using? (stable, testing etc) Also, do you mean that the boot process shows up at the wrong resolution and it actually works fine when X starts, or it doesn't work correctly at all? Perhaps I'm reading you're question wrong... Ashton -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/cafxd2aokykm+s5+qv7mchiscqaoryj_9qdct0edzh97fspk...@mail.gmail.com
Re: default resolution on distro boot
On 20120123_154710, mik...@softhome.net wrote: Given that several Linux distros identify (on boot) my display brand and type, get the size only slightly wrong, but default to a resolution that isn't native and doesn't work correctly, how do I identify just what package, module, or kernel part this bug hides in? I'm using a Sharp 32 LCD tv via hdmi cable, and it's identified as a 37. That's not as important as the default resolution, which comes up as 1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable). When I had a similar problem a few years ago, I was given a magic spell that worked for me. Create a file, /etc/X11/xorg.conf, a put the following in it: Section Device Identifier Configured Video Device Option UseBIOS off EndSection This disables a section of the BIOS of the video display monitor. (NOT the 'BIOS' of the computer) . Some manufactures seem to have seem to have recorded operating parameters for a CRT monitor into their flatscreen displays. Or some such craziness. As I say, except for the crazy explanation, this is purely a magic incantation that has worked for me. YMMV, HTH, etc..etc. See man xorg.conf for a more impressive explanation. -- Paul E Condon pecon...@mesanetworks.net -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120124040611.ga...@big.lan.gnu
