On Sat, Jun 04, 2016 at 02:43:25AM -0400, Felix Miata wrote: > Mostafa Shahverdy composed on 2016-06-04 10:16 (UTC+0430): > > > On Thu, Jun 02, 2016 at 11:54:00PM -0400, Felix Miata wrote: > > > > Mostafa Shahverdy composed on 2016-05-30 17:53 (UTC+0430): > > > > > I have an ultra wide monitor that supports 2560x1080. > > > > While I have a Radeon 5450 graphic card, running Debian Sid, I only can get 1920x1080. > > > ... > > > > I suggest you try purging xserver-xorg-video-ati and xserver-xorg-video-radeon. > > > I couldn't get Stretch's radeon to do 2560x1080 with HD5450 either, but > > > 2560x1080 WFM with the built-in/native Xorg modeset driver, the recommended > > > FOSS driver for non-ancient gfxchips in xserver versions >1.16.x: > > > > http://fm.no-ip.com/SS/KDE/d9tde-desktop-2560x1080.jpg > > > I did. Now I get a better video (no glitches while playing movies). But > > still I can get only 1920x1080. > > > I have to mention that using a DVI cable I can get 2560x1080, but it is > > very very noisy. > > I don't know, but were it not that in Windows 2560x1080 works OK I would > suspect this meant you might have cables that aren't up to the task, or a > possibly borderline defective HD5450. Maybe Linux, either kernel or driver > or Xorg, is less efficient and needs higher quality cabling? How long are > the cables you tried? What gauge is the HDMI cable's wires? Which version > does your HDMI cable support, 1.1? 1.2? 1.3? 1.4? At this moment I can't tell if my cables support different versions of HDMI or not, because I don't know how to check them. But I know one thing about my DVI cable. Although it has DVI-D Dual-Link connectors, but I think it is Single-Link, because it is thin. From this video https://www.youtube.com/watch?v=4lwwO-eNJPc I can say my cable is not proper. I have to check it using a Multimeter, which I don't have one at the moment. Also the lable on my DVI calbe (on cable itself, and not connectors) is "High Speed HDMI cable 20276 style 80c 30v vw-1 -- Made in CHINA". > > Note that AIUI, DVI and HDMI video signals are the same, the main difference > that I'm aware of between DVI and HDMI being that a DVI cable omits carriage > of audio. I think a Dual-Link DVI-D must be thicker thank HDMI, right? > > Video noise on DVI could be a software issue, DE/theme or driver or server. > If it's theme or DE, disabling compositing or switching themes might be > workarounds. > > Possibly someone might be able to spot a remaining issue if you share this > latest Xorg.0.log and .xsession-errors from using the HDMI cable and modeset > driver - maybe even me. It could be a custom xorg.conf file could work > around an EDID shortcoming that the Windows driver avoids. > > Booting some other distribution's live media might be telling. It could be > that your particular hardware in combination with Sid uncovers an Xorg or > kernel bug that does not manifest elsewhere. Try the Knoppix 7.6 DVD or one > of openSUSE's (42.1, kernel 4.1.21/server 1.17.2 or Tumbleweed, kernel > 4.6.0/server 1.18.3) or Fedora's latest (v23, kernel 4.5.5/server 1.18.3 via > updates, or v24 beta, kernel 4.5.5/server 1.18.3). > > I don't think I know enough to suggest any more except to refer to this very > thread[1] by starting a thread on the xorg-driver-ati@lists.x.org and/or the > xorg@lists.x.org list. I'm going to check cables, test a live OS and see results. If there was no luck I will continue on other lists. Thank you for your helps. > > [1] https://lists.debian.org/debian-user/2016/05/msg01057.html > -- > "The wise are known for their understanding, and pleasant > words are persuasive." Proverbs 16:21 (New Living Translation) > > Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! > > Felix Miata *** http://fm.no-ip.com/ > -- Regards, Mostafa Shahverdy <http://www.mostafa.info/pgp>
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