On 09/27/2017 11:11 AM, Markus Kilås wrote: > On 09/22/2017 09:38 AM, Markus Kilås wrote: >> On 09/20/2017 10:16 PM, yuraei...@gmail.com wrote: >>> On Wednesday, September 20, 2017 at 3:16:59 PM UTC, Markus Kilås wrote: >>>> On 09/08/2017 06:17 AM, Pagebao wrote: >>>>> Same thing is happening to me since the last Dom0 update. My ultrawide >>>>> 29" LG external screen stopped working at the native 2560x1080 resolution >>>>> and instead is working at 1920x1080. >>>> >>>> Oh, that is interesting to know. I did not know this was a regression as >>>> I did not use external monitor before. >>>> >>>>> >>>>> I have a Lenovo Thinkpad T430s. I was using nouveau driver but the same >>>>> thing is happening with the integrated Intel graphic card. >>>>> >>>>> Fortunately I had a full backup from August 9 so, reinstalling Qubes 3.2 >>>>> and restoring Dom0 and all the VM the problem is, temporarily, fixed and >>>>> I have back 2560x1080 resolution. >>>>> >>>>> But the most maddening thing is that I tried several different distro >>>>> (Linux Mint 18.2, MX 16.0, Manjaro) and I have the same problem. Only >>>>> 1920x1080px. In the previous 1.5 years I had no problem of resolution >>>>> with Qubes 3.2 and Linux Mint 18.1. >>>>> >>>> >>>> So it could be more of generic Linux issue then? Some problem with >>>> certain kernel or nouveau versions perhaps? >>>> >>>>> Tried cvt and xrandr --newmode and --addmode to no avail so far (no >>>>> effect on Qubes, screen blanked on Linux Mint). >>>>> >>>>> Again, any idea?> >>>>> Thanks >>>>> >>>> >>>> Anything else one can try to resolve this? >>>> >>>> Cheers, >>>> Markus >>> >>> Did you try going back to the previous kernel? The 4.9.35-20? or even the >>> 4.4'ish version if its still in your system?> Also it may not be relevant >>> as my problem with the new kernel >> (4.9.45-21) is of a seemingly very different nature (didn't boot due to >> wanting root account, whatever odd bug was causing that error). Albeit I >> never made it as far to see whether I lost my resolution as well while >> running the new kernel. >> >> I believe I was on 4.9.35-20 and had the issue but will double check. >> >>> >>> Assuming you haven't gone back to older kernels before, it's easy to do >>> without uninstalling/installing anything. If you got Grub2 (Legacy Qubes >>> install mode), then just change to the old kernel during early boot in >>> Grub2's advance menu. If you boot up with UEFI/EFI then you need to change >>> the default boot kernel in the /boot/efi/Qubes/xen.conf (somewhere there >>> abouts. Be careful though, wrong settings will make your system unable to >>> boot up). >>> >>> Obviously far easier to quickly change with Grub2, but it isn't much of a >>> hassle either with editing the xen.cong file if you boot via the modern >>> UEFI instead. Just be careful with the settings. >> >> Thank you, this instructions are very helpful. >> >> >> I am using Grub2 and legacy boot so will try the different kernels on >> Tuesday when I am back in office and have access to the monitor. >> >> >>> >>> Also if it may be of any help, I run Qubes with 3840x2160, 4k resolution >>> with kernel 4.9.35-20, nvidia/integrated Intel-M processor graphics, and >>> XFCE4 as my DE. As mentioned earlier, I'm holding back on the current new >>> Dom0 update with the 4.9.45-21, since it gives me boot issues. Furthermore, >>> I have a lot of issues getting my HDMI TV back on my laptop after >>> suspend/hibernation on my current older kernel. Also if I unplug the HDMI, >>> etc. usually I need to go into "xfce4-display" and turn on the screen >>> manually. Maybe its related to some of the black screen mentioned issues, >>> albeit it might be different too. >>> >>> I'm afraid I can't try help with anything deeper if the problem still >>> persists. Remember to make backups before experimenting with solutions >>> though, it's such a pain to loose things... >>> >>> If kernels are a suspect, we should list our kernels in case we can find >>> clues. Try throw "uname -r" in your Dom0 terminal to list it. >>> >> >> Currently I have uname -a: >> Linux dom0 4.9.45-21.pvops.qubes.x86_64 #1 SMP Tue Aug 29 14:21:02 UTC >> 2017 x86_64 x86_64 x86_64 GNU/Linux >> >> I will retry 4.9.45-20 and also try the oldest I have which is 4.9.35-19. > > I have the issue with all three available kernels: > 4.9.45-21 > 4.9.35-20 > 4.9.35-19 > > Is there a way to install older kernels? > > I tried "sudo qubes-dom0-update --action=list kernel-qubes-vm" but those > are the only available. > > > Regards, > Markus >
Since one of the last updates, high resolution on external monitor is working. I am still on 4.9.45-21 so it was not a kernel change that solved it. Regards, Markus -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/8a74a6e1-920f-3295-88ac-4a4f1eaf330b%40markuspage.com. For more options, visit https://groups.google.com/d/optout.
